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e481066388
When creating a machine for the host explicitly pass in a scoped perf_env. This removes a use of the global perf_env. Signed-off-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20250724163302.596743-17-irogers@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* builtin-kallsyms.c
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*
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* Builtin command: Look for a symbol in the running kernel and its modules
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*
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* Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*/
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#include <inttypes.h>
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#include "builtin.h"
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#include <linux/compiler.h>
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#include <subcmd/parse-options.h>
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#include "debug.h"
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#include "dso.h"
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#include "env.h"
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#include "machine.h"
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#include "map.h"
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#include "symbol.h"
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static int __cmd_kallsyms(int argc, const char **argv)
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{
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int i, err;
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struct perf_env host_env;
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struct machine *machine = NULL;
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perf_env__init(&host_env);
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err = perf_env__set_cmdline(&host_env, argc, argv);
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if (err)
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goto out;
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machine = machine__new_kallsyms(&host_env);
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if (machine == NULL) {
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pr_err("Couldn't read /proc/kallsyms\n");
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err = -1;
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goto out;
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}
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for (i = 0; i < argc; ++i) {
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struct map *map;
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const struct dso *dso;
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struct symbol *symbol = machine__find_kernel_symbol_by_name(machine, argv[i], &map);
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if (symbol == NULL) {
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printf("%s: not found\n", argv[i]);
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continue;
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}
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dso = map__dso(map);
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printf("%s: %s %s %#" PRIx64 "-%#" PRIx64 " (%#" PRIx64 "-%#" PRIx64")\n",
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symbol->name, dso__short_name(dso), dso__long_name(dso),
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map__unmap_ip(map, symbol->start), map__unmap_ip(map, symbol->end),
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symbol->start, symbol->end);
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}
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out:
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machine__delete(machine);
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perf_env__exit(&host_env);
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return err;
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}
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int cmd_kallsyms(int argc, const char **argv)
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{
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const struct option options[] = {
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OPT_INCR('v', "verbose", &verbose, "be more verbose (show counter open errors, etc)"),
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OPT_END()
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};
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const char * const kallsyms_usage[] = {
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"perf kallsyms [<options>] symbol_name",
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NULL
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};
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argc = parse_options(argc, argv, options, kallsyms_usage, 0);
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if (argc < 1)
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usage_with_options(kallsyms_usage, options);
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symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
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if (symbol__init(NULL) < 0)
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return -1;
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return __cmd_kallsyms(argc, argv);
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}
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