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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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ef12a14130
For now it just has operations to examine a given file, find its build-id and add or remove it to/from the cache. Useful, for instance, when adding binaries sent together with a perf.data file, so that we can add them to the cache and have the tools find it when resolving symbols. It'll also manage the size of the cache like 'ccache' does. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1264008525-29025-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
/*
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* builtin-buildid-cache.c
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*
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* Builtin buildid-cache command: Manages build-id cache
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*
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* Copyright (C) 2010, Red Hat Inc.
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* Copyright (C) 2010, Arnaldo Carvalho de Melo <acme@redhat.com>
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*/
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#include "builtin.h"
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#include "perf.h"
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#include "util/cache.h"
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#include "util/debug.h"
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#include "util/header.h"
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#include "util/parse-options.h"
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#include "util/strlist.h"
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#include "util/symbol.h"
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static char const *add_name_list_str, *remove_name_list_str;
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static const char * const buildid_cache_usage[] = {
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"perf buildid-cache [<options>]",
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NULL
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};
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static const struct option buildid_cache_options[] = {
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OPT_STRING('a', "add", &add_name_list_str,
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"file list", "file(s) to add"),
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OPT_STRING('r', "remove", &remove_name_list_str, "file list",
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"file(s) to remove"),
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OPT_BOOLEAN('v', "verbose", &verbose, "be more verbose"),
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OPT_END()
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};
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static int build_id_cache__add_file(const char *filename, const char *debugdir)
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{
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char sbuild_id[BUILD_ID_SIZE * 2 + 1];
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u8 build_id[BUILD_ID_SIZE];
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int err;
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if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) {
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pr_debug("Couldn't read a build-id in %s\n", filename);
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return -1;
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}
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build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
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err = build_id_cache__add_s(sbuild_id, debugdir, filename, false);
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if (verbose)
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pr_info("Adding %s %s: %s\n", sbuild_id, filename,
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err ? "FAIL" : "Ok");
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return err;
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}
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static int build_id_cache__remove_file(const char *filename __used,
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const char *debugdir __used)
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{
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u8 build_id[BUILD_ID_SIZE];
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char sbuild_id[BUILD_ID_SIZE * 2 + 1];
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int err;
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if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) {
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pr_debug("Couldn't read a build-id in %s\n", filename);
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return -1;
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}
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build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
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err = build_id_cache__remove_s(sbuild_id, debugdir);
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if (verbose)
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pr_info("Removing %s %s: %s\n", sbuild_id, filename,
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err ? "FAIL" : "Ok");
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return err;
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}
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static int __cmd_buildid_cache(void)
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{
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struct strlist *list;
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struct str_node *pos;
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char debugdir[PATH_MAX];
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snprintf(debugdir, sizeof(debugdir), "%s/%s", getenv("HOME"),
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DEBUG_CACHE_DIR);
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if (add_name_list_str) {
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list = strlist__new(true, add_name_list_str);
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if (list) {
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strlist__for_each(pos, list)
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if (build_id_cache__add_file(pos->s, debugdir)) {
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if (errno == EEXIST) {
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pr_debug("%s already in the cache\n",
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pos->s);
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continue;
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}
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pr_warning("Couldn't add %s: %s\n",
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pos->s, strerror(errno));
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}
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strlist__delete(list);
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}
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}
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if (remove_name_list_str) {
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list = strlist__new(true, remove_name_list_str);
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if (list) {
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strlist__for_each(pos, list)
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if (build_id_cache__remove_file(pos->s, debugdir)) {
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if (errno == ENOENT) {
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pr_debug("%s wasn't in the cache\n",
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pos->s);
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continue;
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}
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pr_warning("Couldn't remove %s: %s\n",
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pos->s, strerror(errno));
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}
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strlist__delete(list);
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}
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}
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return 0;
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}
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int cmd_buildid_cache(int argc, const char **argv, const char *prefix __used)
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{
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argc = parse_options(argc, argv, buildid_cache_options,
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buildid_cache_usage, 0);
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if (symbol__init() < 0)
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return -1;
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setup_pager();
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return __cmd_buildid_cache();
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}
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