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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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94c744b6c0
That does all the initialization boilerplate, opening the file, reading the header, checking if it is valid, etc. And that will as well have the threads list, kmap (now) global variable, etc, so that we can handle two (or more) perf.data files describing sessions to compare. 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: <1260573842-19720-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
/*
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* builtin-buildid-list.c
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*
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* Builtin buildid-list command: list buildids in perf.data
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*
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* Copyright (C) 2009, Red Hat Inc.
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* Copyright (C) 2009, 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/data_map.h"
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#include "util/debug.h"
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#include "util/parse-options.h"
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#include "util/session.h"
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#include "util/symbol.h"
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static char const *input_name = "perf.data";
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static int force;
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static const char *const buildid_list_usage[] = {
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"perf buildid-list [<options>]",
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NULL
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};
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static const struct option options[] = {
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OPT_STRING('i', "input", &input_name, "file",
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"input file name"),
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OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
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OPT_BOOLEAN('v', "verbose", &verbose,
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"be more verbose"),
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OPT_END()
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};
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static int perf_file_section__process_buildids(struct perf_file_section *self,
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int feat, int fd)
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{
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if (feat != HEADER_BUILD_ID)
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return 0;
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if (lseek(fd, self->offset, SEEK_SET) < 0) {
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pr_warning("Failed to lseek to %Ld offset for buildids!\n",
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self->offset);
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return -1;
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}
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if (perf_header__read_build_ids(fd, self->offset, self->size)) {
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pr_warning("Failed to read buildids!\n");
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return -1;
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}
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return 0;
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}
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static int __cmd_buildid_list(void)
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{
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int err = -1;
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struct perf_session *session = perf_session__new(input_name, O_RDONLY, force);
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if (session == NULL)
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return -1;
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err = perf_header__process_sections(&session->header, session->fd,
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perf_file_section__process_buildids);
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if (err >= 0)
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dsos__fprintf_buildid(stdout);
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perf_session__delete(session);
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return err;
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}
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int cmd_buildid_list(int argc, const char **argv, const char *prefix __used)
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{
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argc = parse_options(argc, argv, options, buildid_list_usage, 0);
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setup_pager();
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return __cmd_buildid_list();
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}
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