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AJvYcCU9debxMCQY3R5VWgl5TwSsd2x3qzJDvRQvAs7Tx8DsKzqfWR2kz4+EEVJ2LtcoOpa1uzB3G1AOZ4hFuNI=@vger.kernel.org X-Gm-Message-State: AOJu0YxqQZOR4HStAi08zg6oi406+yjaPlrrt1+vKsVTO8V5ZIdkDsrO nI9ufUtfDbL1AcOuW5rnG+wmArRftWTUshOs6tENl2SwRjEn9k7NzFbKcBpOR2THgpEzn9jmRcy cl3ca7g== X-Google-Smtp-Source: AGHT+IEJjExpoJgVVZs6Hlo908U0oi37UxrWtfgmlindyP0XfVD6VZ0siD4yNQUpQLPVE+N9T3e9cbC/UfJi X-Received: from oacmm9.prod.google.com ([2002:a05:6871:7289:b0:2b8:e735:4798]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6830:7002:b0:72b:a61c:cbb2 with SMTP id 46e09a7af769-72c6378e768mr9367054a34.10.1743531903184; Tue, 01 Apr 2025 11:25:03 -0700 (PDT) Date: Tue, 1 Apr 2025 11:23:11 -0700 In-Reply-To: <20250401182347.3422199-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250401182347.3422199-1-irogers@google.com> X-Mailer: git-send-email 2.49.0.504.g3bcea36a83-goog Message-ID: <20250401182347.3422199-14-irogers@google.com> Subject: [PATCH v1 13/48] perf trace-event: Silence -Wshorten-64-to-32 warnings From: Ian Rogers To: Yury Norov , Rasmus Villemoes , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , 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 Content-Transfer-Encoding: quoted-printable 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/util/python.c | 4 ++-- .../scripting-engines/trace-event-python.c | 13 ++++++----- tools/perf/util/trace-event-info.c | 3 ++- tools/perf/util/trace-event-parse.c | 2 +- tools/perf/util/trace-event-read.c | 23 +++++++++---------- tools/perf/util/trace-event-scripting.c | 2 +- 6 files changed, 24 insertions(+), 23 deletions(-) diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c index f3c05da25b4a..f55b2b7435ad 100644 --- a/tools/perf/util/python.c +++ b/tools/perf/util/python.c @@ -305,7 +305,7 @@ tracepoint_field(const struct pyrf_event *pe, struct te= p_format_field *field) len =3D field->size; if (field->flags & TEP_FIELD_IS_DYNAMIC) { val =3D tep_read_number(pevent, data + offset, len); - offset =3D val; + offset =3D (unsigned int)val; len =3D offset >> 16; offset &=3D 0xffff; if (tep_field_is_relative(field->flags)) @@ -599,7 +599,7 @@ static PyObject *pyrf_thread_map__item(PyObject *obj, P= y_ssize_t i) if (i >=3D perf_thread_map__nr(pthreads->threads)) return NULL; =20 - return Py_BuildValue("i", perf_thread_map__pid(pthreads->threads, i)); + return Py_BuildValue("i", (int)perf_thread_map__pid(pthreads->threads, (i= nt)i)); } =20 static PySequenceMethods pyrf_thread_map__sequence_methods =3D { diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools= /perf/util/scripting-engines/trace-event-python.c index 520729e78965..547eeb45a832 100644 --- a/tools/perf/util/scripting-engines/trace-event-python.c +++ b/tools/perf/util/scripting-engines/trace-event-python.c @@ -713,9 +713,10 @@ static void set_sample_datasrc_in_dict(PyObject *dict, _PyUnicode_FromString(decode)); } =20 -static void regs_map(struct regs_dump *regs, uint64_t mask, const char *ar= ch, char *bf, int size) +static void regs_map(struct regs_dump *regs, uint64_t mask, const char *ar= ch, char *bf, size_t size) { - unsigned int i =3D 0, r; + unsigned int i =3D 0; + u64 r; int printed =3D 0; =20 bf[0] =3D 0; @@ -731,7 +732,7 @@ static void regs_map(struct regs_dump *regs, uint64_t m= ask, const char *arch, ch =20 printed +=3D scnprintf(bf + printed, size - printed, "%5s:0x%" PRIx64 " ", - perf_reg_name(r, arch), val); + perf_reg_name((int)r, arch), val); } } =20 @@ -744,7 +745,7 @@ static int set_regs_in_dict(PyObject *dict, struct perf_event_attr *attr =3D &evsel->core.attr; const char *arch =3D perf_env__arch(evsel__env(evsel)); =20 - int size =3D (__sw_hweight64(attr->sample_regs_intr) * MAX_REG_SIZE) + 1; + size_t size =3D (__sw_hweight64(attr->sample_regs_intr) * MAX_REG_SIZE) += 1; char *bf =3D NULL; =20 if (sample->intr_regs) { @@ -957,7 +958,7 @@ static void python_process_tracepoint(struct perf_sampl= e *sample, Py_FatalError(handler_name); } =20 - pid =3D raw_field_value(event, "common_pid", data); + pid =3D (int)raw_field_value(event, "common_pid", data); =20 sprintf(handler_name, "%s__%s", event->system, event->name); =20 @@ -1017,7 +1018,7 @@ static void python_process_tracepoint(struct perf_sam= ple *sample, if (field->flags & TEP_FIELD_IS_DYNAMIC) { val =3D tep_read_number(scripting_context->pevent, data + offset, len); - offset =3D val; + offset =3D (unsigned int)val; len =3D offset >> 16; offset &=3D 0xffff; if (tep_field_is_relative(field->flags)) diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-eve= nt-info.c index c8755679281e..0f012890ff21 100644 --- a/tools/perf/util/trace-event-info.c +++ b/tools/perf/util/trace-event-info.c @@ -45,7 +45,8 @@ static int record_file(const char *file, ssize_t hdr_sz) unsigned long long size =3D 0; char buf[BUFSIZ], *sizep; off_t hdr_pos =3D lseek(output_fd, 0, SEEK_CUR); - int r, fd; + int fd; + ssize_t r; int err =3D -EIO; =20 fd =3D open(file, O_RDONLY); diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-ev= ent-parse.c index 9c015fc2bcfb..982cbbc57168 100644 --- a/tools/perf/util/trace-event-parse.c +++ b/tools/perf/util/trace-event-parse.c @@ -34,7 +34,7 @@ static int get_common_field(struct scripting_context *con= text, *size =3D field->size; } =20 - return tep_read_number(pevent, context->event_data + *offset, *size); + return (int)tep_read_number(pevent, context->event_data + *offset, *size); } =20 int common_lock_depth(struct scripting_context *context) diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-eve= nt-read.c index ecbbb93f0185..78a3b3801d69 100644 --- a/tools/perf/util/trace-event-read.c +++ b/tools/perf/util/trace-event-read.c @@ -25,18 +25,18 @@ static int input_fd; static ssize_t trace_data_size; static bool repipe; =20 -static int __do_read(int fd, void *buf, int size) +static int __do_read(int fd, void *buf, size_t size) { - int rsize =3D size; + int rsize =3D (int)size; =20 while (size) { - int ret =3D read(fd, buf, size); + ssize_t ret =3D read(fd, buf, size); =20 if (ret <=3D 0) return -1; =20 if (repipe) { - int retw =3D write(STDOUT_FILENO, buf, ret); + ssize_t retw =3D write(STDOUT_FILENO, buf, ret); =20 if (retw <=3D 0 || retw !=3D ret) { pr_debug("repiping input file"); @@ -51,14 +51,13 @@ static int __do_read(int fd, void *buf, int size) return rsize; } =20 -static int do_read(void *data, int size) +static int do_read(void *data, size_t size) { int r; =20 r =3D __do_read(input_fd, data, size); if (r <=3D 0) { - pr_debug("reading input file (size expected=3D%d received=3D%d)", - size, r); + pr_debug("reading input file (size expected=3D%zd received=3D%d)", size,= r); return -1; } =20 @@ -68,10 +67,10 @@ static int do_read(void *data, int size) } =20 /* If it fails, the next read will report it */ -static void skip(int size) +static void skip(unsigned long long size) { char buf[BUFSIZ]; - int r; + unsigned long long r; =20 while (size) { r =3D size > BUFSIZ ? BUFSIZ : size; @@ -86,7 +85,7 @@ static unsigned int read4(struct tep_handle *pevent) =20 if (do_read(&data, 4) < 0) return 0; - return tep_read_number(pevent, &data, 4); + return (unsigned int)tep_read_number(pevent, &data, 4); } =20 static unsigned long long read8(struct tep_handle *pevent) @@ -119,7 +118,7 @@ static char *read_string(void) } =20 if (repipe) { - int retw =3D write(STDOUT_FILENO, &c, 1); + ssize_t retw =3D write(STDOUT_FILENO, &c, 1); =20 if (retw <=3D 0 || retw !=3D r) { pr_debug("repiping input file string"); @@ -365,7 +364,7 @@ static int read_saved_cmdline(struct tep_handle *pevent) } buf[ret] =3D '\0'; =20 - parse_saved_cmdline(pevent, buf, size); + parse_saved_cmdline(pevent, buf, (unsigned int)size); ret =3D 0; out: free(buf); diff --git a/tools/perf/util/trace-event-scripting.c b/tools/perf/util/trac= e-event-scripting.c index 72abb28b7b5a..fb1fa227c98e 100644 --- a/tools/perf/util/trace-event-scripting.c +++ b/tools/perf/util/trace-event-scripting.c @@ -422,5 +422,5 @@ int perf_sample__sprintf_flags(u32 flags, char *str, si= ze_t sz) if (pos < sz) str[pos] =3D 0; =20 - return pos; + return (int)pos; } --=20 2.49.0.504.g3bcea36a83-goog