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d8f9da2404
In places where the equivalent was already being done, i.e.: free(a); a = NULL; And in placs where struct members are being freed so that if we have some erroneous reference to its struct, then accesses to freed members will result in segfaults, which we can detect faster than use after free to areas that may still have something seemingly valid. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-jatyoofo5boc1bsvoig6bb6i@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Display a menu with individual samples to browse with perf script */
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#include "hist.h"
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#include "evsel.h"
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#include "hists.h"
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#include "sort.h"
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#include "config.h"
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#include "time-utils.h"
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#include <linux/time64.h>
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#include <linux/zalloc.h>
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static u64 context_len = 10 * NSEC_PER_MSEC;
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static int res_sample_config(const char *var, const char *value, void *data __maybe_unused)
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{
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if (!strcmp(var, "samples.context"))
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return perf_config_u64(&context_len, var, value);
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return 0;
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}
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void res_sample_init(void)
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{
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perf_config(res_sample_config, NULL);
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}
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int res_sample_browse(struct res_sample *res_samples, int num_res,
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struct perf_evsel *evsel, enum rstype rstype)
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{
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char **names;
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int i, n;
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int choice;
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char *cmd;
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char pbuf[256], tidbuf[32], cpubuf[32];
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const char *perf = perf_exe(pbuf, sizeof pbuf);
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char trange[128], tsample[64];
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struct res_sample *r;
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char extra_format[256];
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names = calloc(num_res, sizeof(char *));
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if (!names)
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return -1;
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for (i = 0; i < num_res; i++) {
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char tbuf[64];
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timestamp__scnprintf_nsec(res_samples[i].time, tbuf, sizeof tbuf);
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if (asprintf(&names[i], "%s: CPU %d tid %d", tbuf,
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res_samples[i].cpu, res_samples[i].tid) < 0) {
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while (--i >= 0)
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zfree(&names[i]);
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free(names);
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return -1;
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}
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}
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choice = ui__popup_menu(num_res, names);
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for (i = 0; i < num_res; i++)
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zfree(&names[i]);
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free(names);
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if (choice < 0 || choice >= num_res)
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return -1;
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r = &res_samples[choice];
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n = timestamp__scnprintf_nsec(r->time - context_len, trange, sizeof trange);
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trange[n++] = ',';
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timestamp__scnprintf_nsec(r->time + context_len, trange + n, sizeof trange - n);
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timestamp__scnprintf_nsec(r->time, tsample, sizeof tsample);
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attr_to_script(extra_format, &evsel->attr);
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if (asprintf(&cmd, "%s script %s%s --time %s %s%s %s%s --ns %s %s %s %s %s | less +/%s",
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perf,
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input_name ? "-i " : "",
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input_name ? input_name : "",
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trange,
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r->cpu >= 0 ? "--cpu " : "",
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r->cpu >= 0 ? (sprintf(cpubuf, "%d", r->cpu), cpubuf) : "",
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r->tid ? "--tid " : "",
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r->tid ? (sprintf(tidbuf, "%d", r->tid), tidbuf) : "",
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extra_format,
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rstype == A_ASM ? "-F +insn --xed" :
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rstype == A_SOURCE ? "-F +srcline,+srccode" : "",
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symbol_conf.inline_name ? "--inline" : "",
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"--show-lost-events ",
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r->tid ? "--show-switch-events --show-task-events " : "",
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tsample) < 0)
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return -1;
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run_script(cmd);
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free(cmd);
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return 0;
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}
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