forked from Minki/linux
73f75fb1bd
Provide hooks so that an AUX area decoder can process AUX area tracing events. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1428594864-29309-14-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
947 lines
22 KiB
C
947 lines
22 KiB
C
/*
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* auxtrace.c: AUX area trace support
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* Copyright (c) 2013-2015, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <stdbool.h>
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#include <linux/kernel.h>
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#include <linux/perf_event.h>
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#include <linux/types.h>
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#include <linux/bitops.h>
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#include <linux/log2.h>
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#include <linux/string.h>
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#include <sys/param.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <limits.h>
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#include <errno.h>
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#include <linux/list.h>
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#include "../perf.h"
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#include "util.h"
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#include "evlist.h"
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#include "cpumap.h"
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#include "thread_map.h"
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#include "asm/bug.h"
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#include "auxtrace.h"
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#include "event.h"
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#include "session.h"
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#include "debug.h"
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#include "parse-options.h"
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int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
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struct auxtrace_mmap_params *mp,
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void *userpg, int fd)
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{
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struct perf_event_mmap_page *pc = userpg;
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#if BITS_PER_LONG != 64 && !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
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pr_err("Cannot use AUX area tracing mmaps\n");
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return -1;
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#endif
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WARN_ONCE(mm->base, "Uninitialized auxtrace_mmap\n");
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mm->userpg = userpg;
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mm->mask = mp->mask;
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mm->len = mp->len;
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mm->prev = 0;
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mm->idx = mp->idx;
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mm->tid = mp->tid;
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mm->cpu = mp->cpu;
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if (!mp->len) {
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mm->base = NULL;
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return 0;
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}
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pc->aux_offset = mp->offset;
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pc->aux_size = mp->len;
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mm->base = mmap(NULL, mp->len, mp->prot, MAP_SHARED, fd, mp->offset);
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if (mm->base == MAP_FAILED) {
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pr_debug2("failed to mmap AUX area\n");
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mm->base = NULL;
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return -1;
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}
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return 0;
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}
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void auxtrace_mmap__munmap(struct auxtrace_mmap *mm)
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{
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if (mm->base) {
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munmap(mm->base, mm->len);
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mm->base = NULL;
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}
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}
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void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
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off_t auxtrace_offset,
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unsigned int auxtrace_pages,
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bool auxtrace_overwrite)
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{
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if (auxtrace_pages) {
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mp->offset = auxtrace_offset;
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mp->len = auxtrace_pages * (size_t)page_size;
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mp->mask = is_power_of_2(mp->len) ? mp->len - 1 : 0;
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mp->prot = PROT_READ | (auxtrace_overwrite ? 0 : PROT_WRITE);
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pr_debug2("AUX area mmap length %zu\n", mp->len);
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} else {
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mp->len = 0;
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}
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}
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void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
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struct perf_evlist *evlist, int idx,
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bool per_cpu)
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{
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mp->idx = idx;
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if (per_cpu) {
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mp->cpu = evlist->cpus->map[idx];
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if (evlist->threads)
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mp->tid = evlist->threads->map[0];
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else
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mp->tid = -1;
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} else {
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mp->cpu = -1;
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mp->tid = evlist->threads->map[idx];
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}
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}
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#define AUXTRACE_INIT_NR_QUEUES 32
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static struct auxtrace_queue *auxtrace_alloc_queue_array(unsigned int nr_queues)
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{
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struct auxtrace_queue *queue_array;
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unsigned int max_nr_queues, i;
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max_nr_queues = UINT_MAX / sizeof(struct auxtrace_queue);
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if (nr_queues > max_nr_queues)
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return NULL;
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queue_array = calloc(nr_queues, sizeof(struct auxtrace_queue));
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if (!queue_array)
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return NULL;
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for (i = 0; i < nr_queues; i++) {
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INIT_LIST_HEAD(&queue_array[i].head);
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queue_array[i].priv = NULL;
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}
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return queue_array;
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}
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int auxtrace_queues__init(struct auxtrace_queues *queues)
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{
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queues->nr_queues = AUXTRACE_INIT_NR_QUEUES;
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queues->queue_array = auxtrace_alloc_queue_array(queues->nr_queues);
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if (!queues->queue_array)
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return -ENOMEM;
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return 0;
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}
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static int auxtrace_queues__grow(struct auxtrace_queues *queues,
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unsigned int new_nr_queues)
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{
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unsigned int nr_queues = queues->nr_queues;
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struct auxtrace_queue *queue_array;
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unsigned int i;
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if (!nr_queues)
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nr_queues = AUXTRACE_INIT_NR_QUEUES;
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while (nr_queues && nr_queues < new_nr_queues)
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nr_queues <<= 1;
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if (nr_queues < queues->nr_queues || nr_queues < new_nr_queues)
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return -EINVAL;
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queue_array = auxtrace_alloc_queue_array(nr_queues);
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if (!queue_array)
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return -ENOMEM;
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for (i = 0; i < queues->nr_queues; i++) {
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list_splice_tail(&queues->queue_array[i].head,
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&queue_array[i].head);
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queue_array[i].priv = queues->queue_array[i].priv;
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}
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queues->nr_queues = nr_queues;
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queues->queue_array = queue_array;
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return 0;
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}
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static void *auxtrace_copy_data(u64 size, struct perf_session *session)
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{
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int fd = perf_data_file__fd(session->file);
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void *p;
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ssize_t ret;
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if (size > SSIZE_MAX)
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return NULL;
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p = malloc(size);
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if (!p)
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return NULL;
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ret = readn(fd, p, size);
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if (ret != (ssize_t)size) {
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free(p);
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return NULL;
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}
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return p;
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}
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static int auxtrace_queues__add_buffer(struct auxtrace_queues *queues,
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unsigned int idx,
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struct auxtrace_buffer *buffer)
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{
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struct auxtrace_queue *queue;
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int err;
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if (idx >= queues->nr_queues) {
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err = auxtrace_queues__grow(queues, idx + 1);
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if (err)
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return err;
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}
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queue = &queues->queue_array[idx];
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if (!queue->set) {
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queue->set = true;
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queue->tid = buffer->tid;
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queue->cpu = buffer->cpu;
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} else if (buffer->cpu != queue->cpu || buffer->tid != queue->tid) {
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pr_err("auxtrace queue conflict: cpu %d, tid %d vs cpu %d, tid %d\n",
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queue->cpu, queue->tid, buffer->cpu, buffer->tid);
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return -EINVAL;
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}
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buffer->buffer_nr = queues->next_buffer_nr++;
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list_add_tail(&buffer->list, &queue->head);
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queues->new_data = true;
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queues->populated = true;
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return 0;
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}
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/* Limit buffers to 32MiB on 32-bit */
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#define BUFFER_LIMIT_FOR_32_BIT (32 * 1024 * 1024)
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static int auxtrace_queues__split_buffer(struct auxtrace_queues *queues,
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unsigned int idx,
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struct auxtrace_buffer *buffer)
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{
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u64 sz = buffer->size;
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bool consecutive = false;
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struct auxtrace_buffer *b;
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int err;
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while (sz > BUFFER_LIMIT_FOR_32_BIT) {
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b = memdup(buffer, sizeof(struct auxtrace_buffer));
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if (!b)
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return -ENOMEM;
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b->size = BUFFER_LIMIT_FOR_32_BIT;
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b->consecutive = consecutive;
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err = auxtrace_queues__add_buffer(queues, idx, b);
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if (err) {
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auxtrace_buffer__free(b);
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return err;
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}
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buffer->data_offset += BUFFER_LIMIT_FOR_32_BIT;
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sz -= BUFFER_LIMIT_FOR_32_BIT;
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consecutive = true;
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}
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buffer->size = sz;
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buffer->consecutive = consecutive;
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return 0;
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}
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static int auxtrace_queues__add_event_buffer(struct auxtrace_queues *queues,
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struct perf_session *session,
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unsigned int idx,
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struct auxtrace_buffer *buffer)
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{
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if (session->one_mmap) {
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buffer->data = buffer->data_offset - session->one_mmap_offset +
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session->one_mmap_addr;
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} else if (perf_data_file__is_pipe(session->file)) {
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buffer->data = auxtrace_copy_data(buffer->size, session);
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if (!buffer->data)
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return -ENOMEM;
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buffer->data_needs_freeing = true;
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} else if (BITS_PER_LONG == 32 &&
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buffer->size > BUFFER_LIMIT_FOR_32_BIT) {
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int err;
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err = auxtrace_queues__split_buffer(queues, idx, buffer);
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if (err)
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return err;
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}
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return auxtrace_queues__add_buffer(queues, idx, buffer);
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}
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int auxtrace_queues__add_event(struct auxtrace_queues *queues,
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struct perf_session *session,
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union perf_event *event, off_t data_offset,
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struct auxtrace_buffer **buffer_ptr)
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{
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struct auxtrace_buffer *buffer;
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unsigned int idx;
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int err;
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buffer = zalloc(sizeof(struct auxtrace_buffer));
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if (!buffer)
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return -ENOMEM;
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buffer->pid = -1;
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buffer->tid = event->auxtrace.tid;
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buffer->cpu = event->auxtrace.cpu;
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buffer->data_offset = data_offset;
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buffer->offset = event->auxtrace.offset;
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buffer->reference = event->auxtrace.reference;
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buffer->size = event->auxtrace.size;
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idx = event->auxtrace.idx;
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err = auxtrace_queues__add_event_buffer(queues, session, idx, buffer);
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if (err)
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goto out_err;
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if (buffer_ptr)
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*buffer_ptr = buffer;
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return 0;
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out_err:
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auxtrace_buffer__free(buffer);
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return err;
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}
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void auxtrace_queues__free(struct auxtrace_queues *queues)
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{
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unsigned int i;
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for (i = 0; i < queues->nr_queues; i++) {
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while (!list_empty(&queues->queue_array[i].head)) {
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struct auxtrace_buffer *buffer;
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buffer = list_entry(queues->queue_array[i].head.next,
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struct auxtrace_buffer, list);
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list_del(&buffer->list);
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auxtrace_buffer__free(buffer);
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}
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}
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zfree(&queues->queue_array);
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queues->nr_queues = 0;
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}
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static void auxtrace_heapify(struct auxtrace_heap_item *heap_array,
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unsigned int pos, unsigned int queue_nr,
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u64 ordinal)
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{
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unsigned int parent;
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while (pos) {
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parent = (pos - 1) >> 1;
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if (heap_array[parent].ordinal <= ordinal)
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break;
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heap_array[pos] = heap_array[parent];
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pos = parent;
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}
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heap_array[pos].queue_nr = queue_nr;
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heap_array[pos].ordinal = ordinal;
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}
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int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr,
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u64 ordinal)
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{
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struct auxtrace_heap_item *heap_array;
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if (queue_nr >= heap->heap_sz) {
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unsigned int heap_sz = AUXTRACE_INIT_NR_QUEUES;
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while (heap_sz <= queue_nr)
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heap_sz <<= 1;
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heap_array = realloc(heap->heap_array,
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heap_sz * sizeof(struct auxtrace_heap_item));
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if (!heap_array)
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return -ENOMEM;
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heap->heap_array = heap_array;
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heap->heap_sz = heap_sz;
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}
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auxtrace_heapify(heap->heap_array, heap->heap_cnt++, queue_nr, ordinal);
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return 0;
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}
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void auxtrace_heap__free(struct auxtrace_heap *heap)
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{
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zfree(&heap->heap_array);
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heap->heap_cnt = 0;
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heap->heap_sz = 0;
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}
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void auxtrace_heap__pop(struct auxtrace_heap *heap)
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{
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unsigned int pos, last, heap_cnt = heap->heap_cnt;
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struct auxtrace_heap_item *heap_array;
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if (!heap_cnt)
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return;
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heap->heap_cnt -= 1;
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heap_array = heap->heap_array;
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pos = 0;
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while (1) {
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unsigned int left, right;
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left = (pos << 1) + 1;
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if (left >= heap_cnt)
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break;
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right = left + 1;
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if (right >= heap_cnt) {
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heap_array[pos] = heap_array[left];
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return;
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}
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if (heap_array[left].ordinal < heap_array[right].ordinal) {
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heap_array[pos] = heap_array[left];
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pos = left;
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} else {
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heap_array[pos] = heap_array[right];
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pos = right;
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}
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}
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last = heap_cnt - 1;
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auxtrace_heapify(heap_array, pos, heap_array[last].queue_nr,
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heap_array[last].ordinal);
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}
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size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr)
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{
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if (itr)
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return itr->info_priv_size(itr);
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return 0;
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}
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static int auxtrace_not_supported(void)
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{
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pr_err("AUX area tracing is not supported on this architecture\n");
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return -EINVAL;
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}
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int auxtrace_record__info_fill(struct auxtrace_record *itr,
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struct perf_session *session,
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struct auxtrace_info_event *auxtrace_info,
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size_t priv_size)
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{
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if (itr)
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return itr->info_fill(itr, session, auxtrace_info, priv_size);
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return auxtrace_not_supported();
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}
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void auxtrace_record__free(struct auxtrace_record *itr)
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{
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if (itr)
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itr->free(itr);
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}
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int auxtrace_record__options(struct auxtrace_record *itr,
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struct perf_evlist *evlist,
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struct record_opts *opts)
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{
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if (itr)
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return itr->recording_options(itr, evlist, opts);
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return 0;
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}
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u64 auxtrace_record__reference(struct auxtrace_record *itr)
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{
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if (itr)
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return itr->reference(itr);
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return 0;
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}
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struct auxtrace_record *__weak
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auxtrace_record__init(struct perf_evlist *evlist __maybe_unused, int *err)
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{
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*err = 0;
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return NULL;
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}
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struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue,
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struct auxtrace_buffer *buffer)
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{
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if (buffer) {
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if (list_is_last(&buffer->list, &queue->head))
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return NULL;
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return list_entry(buffer->list.next, struct auxtrace_buffer,
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list);
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} else {
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if (list_empty(&queue->head))
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return NULL;
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return list_entry(queue->head.next, struct auxtrace_buffer,
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list);
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}
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}
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void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd)
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{
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size_t adj = buffer->data_offset & (page_size - 1);
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size_t size = buffer->size + adj;
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off_t file_offset = buffer->data_offset - adj;
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void *addr;
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if (buffer->data)
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return buffer->data;
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addr = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, file_offset);
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if (addr == MAP_FAILED)
|
|
return NULL;
|
|
|
|
buffer->mmap_addr = addr;
|
|
buffer->mmap_size = size;
|
|
|
|
buffer->data = addr + adj;
|
|
|
|
return buffer->data;
|
|
}
|
|
|
|
void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer)
|
|
{
|
|
if (!buffer->data || !buffer->mmap_addr)
|
|
return;
|
|
munmap(buffer->mmap_addr, buffer->mmap_size);
|
|
buffer->mmap_addr = NULL;
|
|
buffer->mmap_size = 0;
|
|
buffer->data = NULL;
|
|
buffer->use_data = NULL;
|
|
}
|
|
|
|
void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer)
|
|
{
|
|
auxtrace_buffer__put_data(buffer);
|
|
if (buffer->data_needs_freeing) {
|
|
buffer->data_needs_freeing = false;
|
|
zfree(&buffer->data);
|
|
buffer->use_data = NULL;
|
|
buffer->size = 0;
|
|
}
|
|
}
|
|
|
|
void auxtrace_buffer__free(struct auxtrace_buffer *buffer)
|
|
{
|
|
auxtrace_buffer__drop_data(buffer);
|
|
free(buffer);
|
|
}
|
|
|
|
void auxtrace_synth_error(struct auxtrace_error_event *auxtrace_error, int type,
|
|
int code, int cpu, pid_t pid, pid_t tid, u64 ip,
|
|
const char *msg)
|
|
{
|
|
size_t size;
|
|
|
|
memset(auxtrace_error, 0, sizeof(struct auxtrace_error_event));
|
|
|
|
auxtrace_error->header.type = PERF_RECORD_AUXTRACE_ERROR;
|
|
auxtrace_error->type = type;
|
|
auxtrace_error->code = code;
|
|
auxtrace_error->cpu = cpu;
|
|
auxtrace_error->pid = pid;
|
|
auxtrace_error->tid = tid;
|
|
auxtrace_error->ip = ip;
|
|
strlcpy(auxtrace_error->msg, msg, MAX_AUXTRACE_ERROR_MSG);
|
|
|
|
size = (void *)auxtrace_error->msg - (void *)auxtrace_error +
|
|
strlen(auxtrace_error->msg) + 1;
|
|
auxtrace_error->header.size = PERF_ALIGN(size, sizeof(u64));
|
|
}
|
|
|
|
int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
|
|
struct perf_tool *tool,
|
|
struct perf_session *session,
|
|
perf_event__handler_t process)
|
|
{
|
|
union perf_event *ev;
|
|
size_t priv_size;
|
|
int err;
|
|
|
|
pr_debug2("Synthesizing auxtrace information\n");
|
|
priv_size = auxtrace_record__info_priv_size(itr);
|
|
ev = zalloc(sizeof(struct auxtrace_info_event) + priv_size);
|
|
if (!ev)
|
|
return -ENOMEM;
|
|
|
|
ev->auxtrace_info.header.type = PERF_RECORD_AUXTRACE_INFO;
|
|
ev->auxtrace_info.header.size = sizeof(struct auxtrace_info_event) +
|
|
priv_size;
|
|
err = auxtrace_record__info_fill(itr, session, &ev->auxtrace_info,
|
|
priv_size);
|
|
if (err)
|
|
goto out_free;
|
|
|
|
err = process(tool, ev, NULL, NULL);
|
|
out_free:
|
|
free(ev);
|
|
return err;
|
|
}
|
|
|
|
static bool auxtrace__dont_decode(struct perf_session *session)
|
|
{
|
|
return !session->itrace_synth_opts ||
|
|
session->itrace_synth_opts->dont_decode;
|
|
}
|
|
|
|
int perf_event__process_auxtrace_info(struct perf_tool *tool __maybe_unused,
|
|
union perf_event *event,
|
|
struct perf_session *session __maybe_unused)
|
|
{
|
|
enum auxtrace_type type = event->auxtrace_info.type;
|
|
|
|
if (dump_trace)
|
|
fprintf(stdout, " type: %u\n", type);
|
|
|
|
switch (type) {
|
|
case PERF_AUXTRACE_UNKNOWN:
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
s64 perf_event__process_auxtrace(struct perf_tool *tool,
|
|
union perf_event *event,
|
|
struct perf_session *session)
|
|
{
|
|
s64 err;
|
|
|
|
if (dump_trace)
|
|
fprintf(stdout, " size: %#"PRIx64" offset: %#"PRIx64" ref: %#"PRIx64" idx: %u tid: %d cpu: %d\n",
|
|
event->auxtrace.size, event->auxtrace.offset,
|
|
event->auxtrace.reference, event->auxtrace.idx,
|
|
event->auxtrace.tid, event->auxtrace.cpu);
|
|
|
|
if (auxtrace__dont_decode(session))
|
|
return event->auxtrace.size;
|
|
|
|
if (!session->auxtrace || event->header.type != PERF_RECORD_AUXTRACE)
|
|
return -EINVAL;
|
|
|
|
err = session->auxtrace->process_auxtrace_event(session, event, tool);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return event->auxtrace.size;
|
|
}
|
|
|
|
#define PERF_ITRACE_DEFAULT_PERIOD_TYPE PERF_ITRACE_PERIOD_NANOSECS
|
|
#define PERF_ITRACE_DEFAULT_PERIOD 100000
|
|
#define PERF_ITRACE_DEFAULT_CALLCHAIN_SZ 16
|
|
#define PERF_ITRACE_MAX_CALLCHAIN_SZ 1024
|
|
|
|
void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts)
|
|
{
|
|
synth_opts->instructions = true;
|
|
synth_opts->branches = true;
|
|
synth_opts->errors = true;
|
|
synth_opts->period_type = PERF_ITRACE_DEFAULT_PERIOD_TYPE;
|
|
synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
|
|
synth_opts->callchain_sz = PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
|
|
}
|
|
|
|
/*
|
|
* Please check tools/perf/Documentation/perf-script.txt for information
|
|
* about the options parsed here, which is introduced after this cset,
|
|
* when support in 'perf script' for these options is introduced.
|
|
*/
|
|
int itrace_parse_synth_opts(const struct option *opt, const char *str,
|
|
int unset)
|
|
{
|
|
struct itrace_synth_opts *synth_opts = opt->value;
|
|
const char *p;
|
|
char *endptr;
|
|
|
|
synth_opts->set = true;
|
|
|
|
if (unset) {
|
|
synth_opts->dont_decode = true;
|
|
return 0;
|
|
}
|
|
|
|
if (!str) {
|
|
itrace_synth_opts__set_default(synth_opts);
|
|
return 0;
|
|
}
|
|
|
|
for (p = str; *p;) {
|
|
switch (*p++) {
|
|
case 'i':
|
|
synth_opts->instructions = true;
|
|
while (*p == ' ' || *p == ',')
|
|
p += 1;
|
|
if (isdigit(*p)) {
|
|
synth_opts->period = strtoull(p, &endptr, 10);
|
|
p = endptr;
|
|
while (*p == ' ' || *p == ',')
|
|
p += 1;
|
|
switch (*p++) {
|
|
case 'i':
|
|
synth_opts->period_type =
|
|
PERF_ITRACE_PERIOD_INSTRUCTIONS;
|
|
break;
|
|
case 't':
|
|
synth_opts->period_type =
|
|
PERF_ITRACE_PERIOD_TICKS;
|
|
break;
|
|
case 'm':
|
|
synth_opts->period *= 1000;
|
|
/* Fall through */
|
|
case 'u':
|
|
synth_opts->period *= 1000;
|
|
/* Fall through */
|
|
case 'n':
|
|
if (*p++ != 's')
|
|
goto out_err;
|
|
synth_opts->period_type =
|
|
PERF_ITRACE_PERIOD_NANOSECS;
|
|
break;
|
|
case '\0':
|
|
goto out;
|
|
default:
|
|
goto out_err;
|
|
}
|
|
}
|
|
break;
|
|
case 'b':
|
|
synth_opts->branches = true;
|
|
break;
|
|
case 'e':
|
|
synth_opts->errors = true;
|
|
break;
|
|
case 'd':
|
|
synth_opts->log = true;
|
|
break;
|
|
case 'c':
|
|
synth_opts->branches = true;
|
|
synth_opts->calls = true;
|
|
break;
|
|
case 'r':
|
|
synth_opts->branches = true;
|
|
synth_opts->returns = true;
|
|
break;
|
|
case 'g':
|
|
synth_opts->instructions = true;
|
|
synth_opts->callchain = true;
|
|
synth_opts->callchain_sz =
|
|
PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
|
|
while (*p == ' ' || *p == ',')
|
|
p += 1;
|
|
if (isdigit(*p)) {
|
|
unsigned int val;
|
|
|
|
val = strtoul(p, &endptr, 10);
|
|
p = endptr;
|
|
if (!val || val > PERF_ITRACE_MAX_CALLCHAIN_SZ)
|
|
goto out_err;
|
|
synth_opts->callchain_sz = val;
|
|
}
|
|
break;
|
|
case ' ':
|
|
case ',':
|
|
break;
|
|
default:
|
|
goto out_err;
|
|
}
|
|
}
|
|
out:
|
|
if (synth_opts->instructions) {
|
|
if (!synth_opts->period_type)
|
|
synth_opts->period_type =
|
|
PERF_ITRACE_DEFAULT_PERIOD_TYPE;
|
|
if (!synth_opts->period)
|
|
synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_err:
|
|
pr_err("Bad Instruction Tracing options '%s'\n", str);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static const char * const auxtrace_error_type_name[] = {
|
|
[PERF_AUXTRACE_ERROR_ITRACE] = "instruction trace",
|
|
};
|
|
|
|
static const char *auxtrace_error_name(int type)
|
|
{
|
|
const char *error_type_name = NULL;
|
|
|
|
if (type < PERF_AUXTRACE_ERROR_MAX)
|
|
error_type_name = auxtrace_error_type_name[type];
|
|
if (!error_type_name)
|
|
error_type_name = "unknown AUX";
|
|
return error_type_name;
|
|
}
|
|
|
|
size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp)
|
|
{
|
|
struct auxtrace_error_event *e = &event->auxtrace_error;
|
|
int ret;
|
|
|
|
ret = fprintf(fp, " %s error type %u",
|
|
auxtrace_error_name(e->type), e->type);
|
|
ret += fprintf(fp, " cpu %d pid %d tid %d ip %#"PRIx64" code %u: %s\n",
|
|
e->cpu, e->pid, e->tid, e->ip, e->code, e->msg);
|
|
return ret;
|
|
}
|
|
|
|
void perf_session__auxtrace_error_inc(struct perf_session *session,
|
|
union perf_event *event)
|
|
{
|
|
struct auxtrace_error_event *e = &event->auxtrace_error;
|
|
|
|
if (e->type < PERF_AUXTRACE_ERROR_MAX)
|
|
session->evlist->stats.nr_auxtrace_errors[e->type] += 1;
|
|
}
|
|
|
|
void events_stats__auxtrace_error_warn(const struct events_stats *stats)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < PERF_AUXTRACE_ERROR_MAX; i++) {
|
|
if (!stats->nr_auxtrace_errors[i])
|
|
continue;
|
|
ui__warning("%u %s errors\n",
|
|
stats->nr_auxtrace_errors[i],
|
|
auxtrace_error_name(i));
|
|
}
|
|
}
|
|
|
|
int perf_event__process_auxtrace_error(struct perf_tool *tool __maybe_unused,
|
|
union perf_event *event,
|
|
struct perf_session *session)
|
|
{
|
|
if (auxtrace__dont_decode(session))
|
|
return 0;
|
|
|
|
perf_event__fprintf_auxtrace_error(event, stdout);
|
|
return 0;
|
|
}
|
|
|
|
int auxtrace_mmap__read(struct auxtrace_mmap *mm, struct auxtrace_record *itr,
|
|
struct perf_tool *tool, process_auxtrace_t fn)
|
|
{
|
|
u64 head = auxtrace_mmap__read_head(mm);
|
|
u64 old = mm->prev, offset, ref;
|
|
unsigned char *data = mm->base;
|
|
size_t size, head_off, old_off, len1, len2, padding;
|
|
union perf_event ev;
|
|
void *data1, *data2;
|
|
|
|
if (old == head)
|
|
return 0;
|
|
|
|
pr_debug3("auxtrace idx %d old %#"PRIx64" head %#"PRIx64" diff %#"PRIx64"\n",
|
|
mm->idx, old, head, head - old);
|
|
|
|
if (mm->mask) {
|
|
head_off = head & mm->mask;
|
|
old_off = old & mm->mask;
|
|
} else {
|
|
head_off = head % mm->len;
|
|
old_off = old % mm->len;
|
|
}
|
|
|
|
if (head_off > old_off)
|
|
size = head_off - old_off;
|
|
else
|
|
size = mm->len - (old_off - head_off);
|
|
|
|
ref = auxtrace_record__reference(itr);
|
|
|
|
if (head > old || size <= head || mm->mask) {
|
|
offset = head - size;
|
|
} else {
|
|
/*
|
|
* When the buffer size is not a power of 2, 'head' wraps at the
|
|
* highest multiple of the buffer size, so we have to subtract
|
|
* the remainder here.
|
|
*/
|
|
u64 rem = (0ULL - mm->len) % mm->len;
|
|
|
|
offset = head - size - rem;
|
|
}
|
|
|
|
if (size > head_off) {
|
|
len1 = size - head_off;
|
|
data1 = &data[mm->len - len1];
|
|
len2 = head_off;
|
|
data2 = &data[0];
|
|
} else {
|
|
len1 = size;
|
|
data1 = &data[head_off - len1];
|
|
len2 = 0;
|
|
data2 = NULL;
|
|
}
|
|
|
|
/* padding must be written by fn() e.g. record__process_auxtrace() */
|
|
padding = size & 7;
|
|
if (padding)
|
|
padding = 8 - padding;
|
|
|
|
memset(&ev, 0, sizeof(ev));
|
|
ev.auxtrace.header.type = PERF_RECORD_AUXTRACE;
|
|
ev.auxtrace.header.size = sizeof(ev.auxtrace);
|
|
ev.auxtrace.size = size + padding;
|
|
ev.auxtrace.offset = offset;
|
|
ev.auxtrace.reference = ref;
|
|
ev.auxtrace.idx = mm->idx;
|
|
ev.auxtrace.tid = mm->tid;
|
|
ev.auxtrace.cpu = mm->cpu;
|
|
|
|
if (fn(tool, &ev, data1, len1, data2, len2))
|
|
return -1;
|
|
|
|
mm->prev = head;
|
|
|
|
auxtrace_mmap__write_tail(mm, head);
|
|
if (itr->read_finish) {
|
|
int err;
|
|
|
|
err = itr->read_finish(itr, mm->idx);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
return 1;
|
|
}
|