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AJvYcCW0ciRXDlGLLDRtpW9DMWWchHlNd0UADIPTzPGkuAw+80EklKMKF/DkOklY+7+J4m9tDY/AVZjQ8QkmzWA86B3z@vger.kernel.org X-Gm-Message-State: AOJu0YwQBA9eHgePnx4N93WRR5X3MxC8UpceIZ5eEj1tfpBPdzB+y3lR 30Iym5VNgGyhwP2qw7elQW15IcCjWy8q/B4FEohzGIUrfZq9CkQmaBDPyltiHcW2vyoANmy4zHH ZibIb5g== X-Google-Smtp-Source: AGHT+IFyafFOLODZtlLUZ4SAqt/4nbRDEmlR3bAZZbbzYAWGepLJ5AUduDFVX4vNjlHCCAGb/csW+ll6bldY X-Received: from pgll63.prod.google.com ([2002:a63:2542:0:b0:b16:9964:4283]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a21:a4c4:b0:1f5:9098:e42e with SMTP id adf61e73a8af0-20ba6a18946mr186677637.7.1746035483831; Wed, 30 Apr 2025 10:51:23 -0700 (PDT) Date: Wed, 30 Apr 2025 10:50:01 -0700 In-Reply-To: <20250430175036.184610-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org 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: <20250430175036.184610-14-irogers@google.com> Subject: [PATCH v2 13/47] perf trace-event: 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/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 tep_format_field *field) len = field->size; if (field->flags & TEP_FIELD_IS_DYNAMIC) { val = tep_read_number(pevent, data + offset, len); - offset = val; + offset = (unsigned int)val; len = offset >> 16; offset &= 0xffff; if (tep_field_is_relative(field->flags)) @@ -599,7 +599,7 @@ static PyObject *pyrf_thread_map__item(PyObject *obj, Py_ssize_t i) if (i >= perf_thread_map__nr(pthreads->threads)) return NULL; - return Py_BuildValue("i", perf_thread_map__pid(pthreads->threads, i)); + return Py_BuildValue("i", (int)perf_thread_map__pid(pthreads->threads, (int)i)); } static PySequenceMethods pyrf_thread_map__sequence_methods = { 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)); } -static void regs_map(struct regs_dump *regs, uint64_t mask, const char *arch, char *bf, int size) +static void regs_map(struct regs_dump *regs, uint64_t mask, const char *arch, char *bf, size_t size) { - unsigned int i = 0, r; + unsigned int i = 0; + u64 r; int printed = 0; bf[0] = 0; @@ -731,7 +732,7 @@ static void regs_map(struct regs_dump *regs, uint64_t mask, const char *arch, ch printed += scnprintf(bf + printed, size - printed, "%5s:0x%" PRIx64 " ", - perf_reg_name(r, arch), val); + perf_reg_name((int)r, arch), val); } } @@ -744,7 +745,7 @@ static int set_regs_in_dict(PyObject *dict, struct perf_event_attr *attr = &evsel->core.attr; const char *arch = perf_env__arch(evsel__env(evsel)); - int size = (__sw_hweight64(attr->sample_regs_intr) * MAX_REG_SIZE) + 1; + size_t size = (__sw_hweight64(attr->sample_regs_intr) * MAX_REG_SIZE) + 1; char *bf = NULL; if (sample->intr_regs) { @@ -957,7 +958,7 @@ static void python_process_tracepoint(struct perf_sample *sample, Py_FatalError(handler_name); } - pid = raw_field_value(event, "common_pid", data); + pid = (int)raw_field_value(event, "common_pid", data); sprintf(handler_name, "%s__%s", event->system, event->name); @@ -1017,7 +1018,7 @@ static void python_process_tracepoint(struct perf_sample *sample, if (field->flags & TEP_FIELD_IS_DYNAMIC) { val = tep_read_number(scripting_context->pevent, data + offset, len); - offset = val; + offset = (unsigned int)val; len = offset >> 16; offset &= 0xffff; if (tep_field_is_relative(field->flags)) diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-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 = 0; char buf[BUFSIZ], *sizep; off_t hdr_pos = lseek(output_fd, 0, SEEK_CUR); - int r, fd; + int fd; + ssize_t r; int err = -EIO; fd = open(file, O_RDONLY); diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-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 *context, *size = field->size; } - return tep_read_number(pevent, context->event_data + *offset, *size); + return (int)tep_read_number(pevent, context->event_data + *offset, *size); } int common_lock_depth(struct scripting_context *context) diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-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; -static int __do_read(int fd, void *buf, int size) +static int __do_read(int fd, void *buf, size_t size) { - int rsize = size; + int rsize = (int)size; while (size) { - int ret = read(fd, buf, size); + ssize_t ret = read(fd, buf, size); if (ret <= 0) return -1; if (repipe) { - int retw = write(STDOUT_FILENO, buf, ret); + ssize_t retw = write(STDOUT_FILENO, buf, ret); if (retw <= 0 || retw != ret) { pr_debug("repiping input file"); @@ -51,14 +51,13 @@ static int __do_read(int fd, void *buf, int size) return rsize; } -static int do_read(void *data, int size) +static int do_read(void *data, size_t size) { int r; r = __do_read(input_fd, data, size); if (r <= 0) { - pr_debug("reading input file (size expected=%d received=%d)", - size, r); + pr_debug("reading input file (size expected=%zd received=%d)", size, r); return -1; } @@ -68,10 +67,10 @@ static int do_read(void *data, int size) } /* 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; while (size) { r = size > BUFSIZ ? BUFSIZ : size; @@ -86,7 +85,7 @@ static unsigned int read4(struct tep_handle *pevent) if (do_read(&data, 4) < 0) return 0; - return tep_read_number(pevent, &data, 4); + return (unsigned int)tep_read_number(pevent, &data, 4); } static unsigned long long read8(struct tep_handle *pevent) @@ -119,7 +118,7 @@ static char *read_string(void) } if (repipe) { - int retw = write(STDOUT_FILENO, &c, 1); + ssize_t retw = write(STDOUT_FILENO, &c, 1); if (retw <= 0 || retw != r) { pr_debug("repiping input file string"); @@ -365,7 +364,7 @@ static int read_saved_cmdline(struct tep_handle *pevent) } buf[ret] = '\0'; - parse_saved_cmdline(pevent, buf, size); + parse_saved_cmdline(pevent, buf, (unsigned int)size); ret = 0; out: free(buf); diff --git a/tools/perf/util/trace-event-scripting.c b/tools/perf/util/trace-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, size_t sz) if (pos < sz) str[pos] = 0; - return pos; + return (int)pos; } -- 2.49.0.906.g1f30a19c02-goog