| /* |
| * intel-bts.c: Intel Processor Trace support |
| * Copyright (c) 2013-2015, Intel Corporation. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| */ |
| |
| #include <endian.h> |
| #include <byteswap.h> |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/bitops.h> |
| #include <linux/log2.h> |
| |
| #include "cpumap.h" |
| #include "color.h" |
| #include "evsel.h" |
| #include "evlist.h" |
| #include "machine.h" |
| #include "session.h" |
| #include "util.h" |
| #include "thread.h" |
| #include "thread-stack.h" |
| #include "debug.h" |
| #include "tsc.h" |
| #include "auxtrace.h" |
| #include "intel-pt-decoder/intel-pt-insn-decoder.h" |
| #include "intel-bts.h" |
| |
| #define MAX_TIMESTAMP (~0ULL) |
| |
| #define INTEL_BTS_ERR_NOINSN 5 |
| #define INTEL_BTS_ERR_LOST 9 |
| |
| #if __BYTE_ORDER == __BIG_ENDIAN |
| #define le64_to_cpu bswap_64 |
| #else |
| #define le64_to_cpu |
| #endif |
| |
| struct intel_bts { |
| struct auxtrace auxtrace; |
| struct auxtrace_queues queues; |
| struct auxtrace_heap heap; |
| u32 auxtrace_type; |
| struct perf_session *session; |
| struct machine *machine; |
| bool sampling_mode; |
| bool snapshot_mode; |
| bool data_queued; |
| u32 pmu_type; |
| struct perf_tsc_conversion tc; |
| bool cap_user_time_zero; |
| struct itrace_synth_opts synth_opts; |
| bool sample_branches; |
| u32 branches_filter; |
| u64 branches_sample_type; |
| u64 branches_id; |
| size_t branches_event_size; |
| bool synth_needs_swap; |
| }; |
| |
| struct intel_bts_queue { |
| struct intel_bts *bts; |
| unsigned int queue_nr; |
| struct auxtrace_buffer *buffer; |
| bool on_heap; |
| bool done; |
| pid_t pid; |
| pid_t tid; |
| int cpu; |
| u64 time; |
| struct intel_pt_insn intel_pt_insn; |
| u32 sample_flags; |
| }; |
| |
| struct branch { |
| u64 from; |
| u64 to; |
| u64 misc; |
| }; |
| |
| static void intel_bts_dump(struct intel_bts *bts __maybe_unused, |
| unsigned char *buf, size_t len) |
| { |
| struct branch *branch; |
| size_t i, pos = 0, br_sz = sizeof(struct branch), sz; |
| const char *color = PERF_COLOR_BLUE; |
| |
| color_fprintf(stdout, color, |
| ". ... Intel BTS data: size %zu bytes\n", |
| len); |
| |
| while (len) { |
| if (len >= br_sz) |
| sz = br_sz; |
| else |
| sz = len; |
| printf("."); |
| color_fprintf(stdout, color, " %08x: ", pos); |
| for (i = 0; i < sz; i++) |
| color_fprintf(stdout, color, " %02x", buf[i]); |
| for (; i < br_sz; i++) |
| color_fprintf(stdout, color, " "); |
| if (len >= br_sz) { |
| branch = (struct branch *)buf; |
| color_fprintf(stdout, color, " %"PRIx64" -> %"PRIx64" %s\n", |
| le64_to_cpu(branch->from), |
| le64_to_cpu(branch->to), |
| le64_to_cpu(branch->misc) & 0x10 ? |
| "pred" : "miss"); |
| } else { |
| color_fprintf(stdout, color, " Bad record!\n"); |
| } |
| pos += sz; |
| buf += sz; |
| len -= sz; |
| } |
| } |
| |
| static void intel_bts_dump_event(struct intel_bts *bts, unsigned char *buf, |
| size_t len) |
| { |
| printf(".\n"); |
| intel_bts_dump(bts, buf, len); |
| } |
| |
| static int intel_bts_lost(struct intel_bts *bts, struct perf_sample *sample) |
| { |
| union perf_event event; |
| int err; |
| |
| auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE, |
| INTEL_BTS_ERR_LOST, sample->cpu, sample->pid, |
| sample->tid, 0, "Lost trace data"); |
| |
| err = perf_session__deliver_synth_event(bts->session, &event, NULL); |
| if (err) |
| pr_err("Intel BTS: failed to deliver error event, error %d\n", |
| err); |
| |
| return err; |
| } |
| |
| static struct intel_bts_queue *intel_bts_alloc_queue(struct intel_bts *bts, |
| unsigned int queue_nr) |
| { |
| struct intel_bts_queue *btsq; |
| |
| btsq = zalloc(sizeof(struct intel_bts_queue)); |
| if (!btsq) |
| return NULL; |
| |
| btsq->bts = bts; |
| btsq->queue_nr = queue_nr; |
| btsq->pid = -1; |
| btsq->tid = -1; |
| btsq->cpu = -1; |
| |
| return btsq; |
| } |
| |
| static int intel_bts_setup_queue(struct intel_bts *bts, |
| struct auxtrace_queue *queue, |
| unsigned int queue_nr) |
| { |
| struct intel_bts_queue *btsq = queue->priv; |
| |
| if (list_empty(&queue->head)) |
| return 0; |
| |
| if (!btsq) { |
| btsq = intel_bts_alloc_queue(bts, queue_nr); |
| if (!btsq) |
| return -ENOMEM; |
| queue->priv = btsq; |
| |
| if (queue->cpu != -1) |
| btsq->cpu = queue->cpu; |
| btsq->tid = queue->tid; |
| } |
| |
| if (bts->sampling_mode) |
| return 0; |
| |
| if (!btsq->on_heap && !btsq->buffer) { |
| int ret; |
| |
| btsq->buffer = auxtrace_buffer__next(queue, NULL); |
| if (!btsq->buffer) |
| return 0; |
| |
| ret = auxtrace_heap__add(&bts->heap, queue_nr, |
| btsq->buffer->reference); |
| if (ret) |
| return ret; |
| btsq->on_heap = true; |
| } |
| |
| return 0; |
| } |
| |
| static int intel_bts_setup_queues(struct intel_bts *bts) |
| { |
| unsigned int i; |
| int ret; |
| |
| for (i = 0; i < bts->queues.nr_queues; i++) { |
| ret = intel_bts_setup_queue(bts, &bts->queues.queue_array[i], |
| i); |
| if (ret) |
| return ret; |
| } |
| return 0; |
| } |
| |
| static inline int intel_bts_update_queues(struct intel_bts *bts) |
| { |
| if (bts->queues.new_data) { |
| bts->queues.new_data = false; |
| return intel_bts_setup_queues(bts); |
| } |
| return 0; |
| } |
| |
| static unsigned char *intel_bts_find_overlap(unsigned char *buf_a, size_t len_a, |
| unsigned char *buf_b, size_t len_b) |
| { |
| size_t offs, len; |
| |
| if (len_a > len_b) |
| offs = len_a - len_b; |
| else |
| offs = 0; |
| |
| for (; offs < len_a; offs += sizeof(struct branch)) { |
| len = len_a - offs; |
| if (!memcmp(buf_a + offs, buf_b, len)) |
| return buf_b + len; |
| } |
| |
| return buf_b; |
| } |
| |
| static int intel_bts_do_fix_overlap(struct auxtrace_queue *queue, |
| struct auxtrace_buffer *b) |
| { |
| struct auxtrace_buffer *a; |
| void *start; |
| |
| if (b->list.prev == &queue->head) |
| return 0; |
| a = list_entry(b->list.prev, struct auxtrace_buffer, list); |
| start = intel_bts_find_overlap(a->data, a->size, b->data, b->size); |
| if (!start) |
| return -EINVAL; |
| b->use_size = b->data + b->size - start; |
| b->use_data = start; |
| return 0; |
| } |
| |
| static int intel_bts_synth_branch_sample(struct intel_bts_queue *btsq, |
| struct branch *branch) |
| { |
| int ret; |
| struct intel_bts *bts = btsq->bts; |
| union perf_event event; |
| struct perf_sample sample = { .ip = 0, }; |
| |
| event.sample.header.type = PERF_RECORD_SAMPLE; |
| event.sample.header.misc = PERF_RECORD_MISC_USER; |
| event.sample.header.size = sizeof(struct perf_event_header); |
| |
| sample.ip = le64_to_cpu(branch->from); |
| sample.pid = btsq->pid; |
| sample.tid = btsq->tid; |
| sample.addr = le64_to_cpu(branch->to); |
| sample.id = btsq->bts->branches_id; |
| sample.stream_id = btsq->bts->branches_id; |
| sample.period = 1; |
| sample.cpu = btsq->cpu; |
| sample.flags = btsq->sample_flags; |
| sample.insn_len = btsq->intel_pt_insn.length; |
| |
| if (bts->synth_opts.inject) { |
| event.sample.header.size = bts->branches_event_size; |
| ret = perf_event__synthesize_sample(&event, |
| bts->branches_sample_type, |
| 0, &sample, |
| bts->synth_needs_swap); |
| if (ret) |
| return ret; |
| } |
| |
| ret = perf_session__deliver_synth_event(bts->session, &event, &sample); |
| if (ret) |
| pr_err("Intel BTS: failed to deliver branch event, error %d\n", |
| ret); |
| |
| return ret; |
| } |
| |
| static int intel_bts_get_next_insn(struct intel_bts_queue *btsq, u64 ip) |
| { |
| struct machine *machine = btsq->bts->machine; |
| struct thread *thread; |
| struct addr_location al; |
| unsigned char buf[1024]; |
| size_t bufsz; |
| ssize_t len; |
| int x86_64; |
| uint8_t cpumode; |
| int err = -1; |
| |
| bufsz = intel_pt_insn_max_size(); |
| |
| if (machine__kernel_ip(machine, ip)) |
| cpumode = PERF_RECORD_MISC_KERNEL; |
| else |
| cpumode = PERF_RECORD_MISC_USER; |
| |
| thread = machine__find_thread(machine, -1, btsq->tid); |
| if (!thread) |
| return -1; |
| |
| thread__find_addr_map(thread, cpumode, MAP__FUNCTION, ip, &al); |
| if (!al.map || !al.map->dso) |
| goto out_put; |
| |
| len = dso__data_read_addr(al.map->dso, al.map, machine, ip, buf, bufsz); |
| if (len <= 0) |
| goto out_put; |
| |
| /* Load maps to ensure dso->is_64_bit has been updated */ |
| map__load(al.map, machine->symbol_filter); |
| |
| x86_64 = al.map->dso->is_64_bit; |
| |
| if (intel_pt_get_insn(buf, len, x86_64, &btsq->intel_pt_insn)) |
| goto out_put; |
| |
| err = 0; |
| out_put: |
| thread__put(thread); |
| return err; |
| } |
| |
| static int intel_bts_synth_error(struct intel_bts *bts, int cpu, pid_t pid, |
| pid_t tid, u64 ip) |
| { |
| union perf_event event; |
| int err; |
| |
| auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE, |
| INTEL_BTS_ERR_NOINSN, cpu, pid, tid, ip, |
| "Failed to get instruction"); |
| |
| err = perf_session__deliver_synth_event(bts->session, &event, NULL); |
| if (err) |
| pr_err("Intel BTS: failed to deliver error event, error %d\n", |
| err); |
| |
| return err; |
| } |
| |
| static int intel_bts_get_branch_type(struct intel_bts_queue *btsq, |
| struct branch *branch) |
| { |
| int err; |
| |
| if (!branch->from) { |
| if (branch->to) |
| btsq->sample_flags = PERF_IP_FLAG_BRANCH | |
| PERF_IP_FLAG_TRACE_BEGIN; |
| else |
| btsq->sample_flags = 0; |
| btsq->intel_pt_insn.length = 0; |
| } else if (!branch->to) { |
| btsq->sample_flags = PERF_IP_FLAG_BRANCH | |
| PERF_IP_FLAG_TRACE_END; |
| btsq->intel_pt_insn.length = 0; |
| } else { |
| err = intel_bts_get_next_insn(btsq, branch->from); |
| if (err) { |
| btsq->sample_flags = 0; |
| btsq->intel_pt_insn.length = 0; |
| if (!btsq->bts->synth_opts.errors) |
| return 0; |
| err = intel_bts_synth_error(btsq->bts, btsq->cpu, |
| btsq->pid, btsq->tid, |
| branch->from); |
| return err; |
| } |
| btsq->sample_flags = intel_pt_insn_type(btsq->intel_pt_insn.op); |
| /* Check for an async branch into the kernel */ |
| if (!machine__kernel_ip(btsq->bts->machine, branch->from) && |
| machine__kernel_ip(btsq->bts->machine, branch->to) && |
| btsq->sample_flags != (PERF_IP_FLAG_BRANCH | |
| PERF_IP_FLAG_CALL | |
| PERF_IP_FLAG_SYSCALLRET)) |
| btsq->sample_flags = PERF_IP_FLAG_BRANCH | |
| PERF_IP_FLAG_CALL | |
| PERF_IP_FLAG_ASYNC | |
| PERF_IP_FLAG_INTERRUPT; |
| } |
| |
| return 0; |
| } |
| |
| static int intel_bts_process_buffer(struct intel_bts_queue *btsq, |
| struct auxtrace_buffer *buffer) |
| { |
| struct branch *branch; |
| size_t sz, bsz = sizeof(struct branch); |
| u32 filter = btsq->bts->branches_filter; |
| int err = 0; |
| |
| if (buffer->use_data) { |
| sz = buffer->use_size; |
| branch = buffer->use_data; |
| } else { |
| sz = buffer->size; |
| branch = buffer->data; |
| } |
| |
| if (!btsq->bts->sample_branches) |
| return 0; |
| |
| for (; sz > bsz; branch += 1, sz -= bsz) { |
| if (!branch->from && !branch->to) |
| continue; |
| intel_bts_get_branch_type(btsq, branch); |
| if (filter && !(filter & btsq->sample_flags)) |
| continue; |
| err = intel_bts_synth_branch_sample(btsq, branch); |
| if (err) |
| break; |
| } |
| return err; |
| } |
| |
| static int intel_bts_process_queue(struct intel_bts_queue *btsq, u64 *timestamp) |
| { |
| struct auxtrace_buffer *buffer = btsq->buffer, *old_buffer = buffer; |
| struct auxtrace_queue *queue; |
| struct thread *thread; |
| int err; |
| |
| if (btsq->done) |
| return 1; |
| |
| if (btsq->pid == -1) { |
| thread = machine__find_thread(btsq->bts->machine, -1, |
| btsq->tid); |
| if (thread) |
| btsq->pid = thread->pid_; |
| } else { |
| thread = machine__findnew_thread(btsq->bts->machine, btsq->pid, |
| btsq->tid); |
| } |
| |
| queue = &btsq->bts->queues.queue_array[btsq->queue_nr]; |
| |
| if (!buffer) |
| buffer = auxtrace_buffer__next(queue, NULL); |
| |
| if (!buffer) { |
| if (!btsq->bts->sampling_mode) |
| btsq->done = 1; |
| err = 1; |
| goto out_put; |
| } |
| |
| /* Currently there is no support for split buffers */ |
| if (buffer->consecutive) { |
| err = -EINVAL; |
| goto out_put; |
| } |
| |
| if (!buffer->data) { |
| int fd = perf_data_file__fd(btsq->bts->session->file); |
| |
| buffer->data = auxtrace_buffer__get_data(buffer, fd); |
| if (!buffer->data) { |
| err = -ENOMEM; |
| goto out_put; |
| } |
| } |
| |
| if (btsq->bts->snapshot_mode && !buffer->consecutive && |
| intel_bts_do_fix_overlap(queue, buffer)) { |
| err = -ENOMEM; |
| goto out_put; |
| } |
| |
| if (!btsq->bts->synth_opts.callchain && thread && |
| (!old_buffer || btsq->bts->sampling_mode || |
| (btsq->bts->snapshot_mode && !buffer->consecutive))) |
| thread_stack__set_trace_nr(thread, buffer->buffer_nr + 1); |
| |
| err = intel_bts_process_buffer(btsq, buffer); |
| |
| auxtrace_buffer__drop_data(buffer); |
| |
| btsq->buffer = auxtrace_buffer__next(queue, buffer); |
| if (btsq->buffer) { |
| if (timestamp) |
| *timestamp = btsq->buffer->reference; |
| } else { |
| if (!btsq->bts->sampling_mode) |
| btsq->done = 1; |
| } |
| out_put: |
| thread__put(thread); |
| return err; |
| } |
| |
| static int intel_bts_flush_queue(struct intel_bts_queue *btsq) |
| { |
| u64 ts = 0; |
| int ret; |
| |
| while (1) { |
| ret = intel_bts_process_queue(btsq, &ts); |
| if (ret < 0) |
| return ret; |
| if (ret) |
| break; |
| } |
| return 0; |
| } |
| |
| static int intel_bts_process_tid_exit(struct intel_bts *bts, pid_t tid) |
| { |
| struct auxtrace_queues *queues = &bts->queues; |
| unsigned int i; |
| |
| for (i = 0; i < queues->nr_queues; i++) { |
| struct auxtrace_queue *queue = &bts->queues.queue_array[i]; |
| struct intel_bts_queue *btsq = queue->priv; |
| |
| if (btsq && btsq->tid == tid) |
| return intel_bts_flush_queue(btsq); |
| } |
| return 0; |
| } |
| |
| static int intel_bts_process_queues(struct intel_bts *bts, u64 timestamp) |
| { |
| while (1) { |
| unsigned int queue_nr; |
| struct auxtrace_queue *queue; |
| struct intel_bts_queue *btsq; |
| u64 ts = 0; |
| int ret; |
| |
| if (!bts->heap.heap_cnt) |
| return 0; |
| |
| if (bts->heap.heap_array[0].ordinal > timestamp) |
| return 0; |
| |
| queue_nr = bts->heap.heap_array[0].queue_nr; |
| queue = &bts->queues.queue_array[queue_nr]; |
| btsq = queue->priv; |
| |
| auxtrace_heap__pop(&bts->heap); |
| |
| ret = intel_bts_process_queue(btsq, &ts); |
| if (ret < 0) { |
| auxtrace_heap__add(&bts->heap, queue_nr, ts); |
| return ret; |
| } |
| |
| if (!ret) { |
| ret = auxtrace_heap__add(&bts->heap, queue_nr, ts); |
| if (ret < 0) |
| return ret; |
| } else { |
| btsq->on_heap = false; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int intel_bts_process_event(struct perf_session *session, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct perf_tool *tool) |
| { |
| struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts, |
| auxtrace); |
| u64 timestamp; |
| int err; |
| |
| if (dump_trace) |
| return 0; |
| |
| if (!tool->ordered_events) { |
| pr_err("Intel BTS requires ordered events\n"); |
| return -EINVAL; |
| } |
| |
| if (sample->time && sample->time != (u64)-1) |
| timestamp = perf_time_to_tsc(sample->time, &bts->tc); |
| else |
| timestamp = 0; |
| |
| err = intel_bts_update_queues(bts); |
| if (err) |
| return err; |
| |
| err = intel_bts_process_queues(bts, timestamp); |
| if (err) |
| return err; |
| if (event->header.type == PERF_RECORD_EXIT) { |
| err = intel_bts_process_tid_exit(bts, event->fork.tid); |
| if (err) |
| return err; |
| } |
| |
| if (event->header.type == PERF_RECORD_AUX && |
| (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) && |
| bts->synth_opts.errors) |
| err = intel_bts_lost(bts, sample); |
| |
| return err; |
| } |
| |
| static int intel_bts_process_auxtrace_event(struct perf_session *session, |
| union perf_event *event, |
| struct perf_tool *tool __maybe_unused) |
| { |
| struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts, |
| auxtrace); |
| |
| if (bts->sampling_mode) |
| return 0; |
| |
| if (!bts->data_queued) { |
| struct auxtrace_buffer *buffer; |
| off_t data_offset; |
| int fd = perf_data_file__fd(session->file); |
| int err; |
| |
| if (perf_data_file__is_pipe(session->file)) { |
| data_offset = 0; |
| } else { |
| data_offset = lseek(fd, 0, SEEK_CUR); |
| if (data_offset == -1) |
| return -errno; |
| } |
| |
| err = auxtrace_queues__add_event(&bts->queues, session, event, |
| data_offset, &buffer); |
| if (err) |
| return err; |
| |
| /* Dump here now we have copied a piped trace out of the pipe */ |
| if (dump_trace) { |
| if (auxtrace_buffer__get_data(buffer, fd)) { |
| intel_bts_dump_event(bts, buffer->data, |
| buffer->size); |
| auxtrace_buffer__put_data(buffer); |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int intel_bts_flush(struct perf_session *session, |
| struct perf_tool *tool __maybe_unused) |
| { |
| struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts, |
| auxtrace); |
| int ret; |
| |
| if (dump_trace || bts->sampling_mode) |
| return 0; |
| |
| if (!tool->ordered_events) |
| return -EINVAL; |
| |
| ret = intel_bts_update_queues(bts); |
| if (ret < 0) |
| return ret; |
| |
| return intel_bts_process_queues(bts, MAX_TIMESTAMP); |
| } |
| |
| static void intel_bts_free_queue(void *priv) |
| { |
| struct intel_bts_queue *btsq = priv; |
| |
| if (!btsq) |
| return; |
| free(btsq); |
| } |
| |
| static void intel_bts_free_events(struct perf_session *session) |
| { |
| struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts, |
| auxtrace); |
| struct auxtrace_queues *queues = &bts->queues; |
| unsigned int i; |
| |
| for (i = 0; i < queues->nr_queues; i++) { |
| intel_bts_free_queue(queues->queue_array[i].priv); |
| queues->queue_array[i].priv = NULL; |
| } |
| auxtrace_queues__free(queues); |
| } |
| |
| static void intel_bts_free(struct perf_session *session) |
| { |
| struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts, |
| auxtrace); |
| |
| auxtrace_heap__free(&bts->heap); |
| intel_bts_free_events(session); |
| session->auxtrace = NULL; |
| free(bts); |
| } |
| |
| struct intel_bts_synth { |
| struct perf_tool dummy_tool; |
| struct perf_session *session; |
| }; |
| |
| static int intel_bts_event_synth(struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample __maybe_unused, |
| struct machine *machine __maybe_unused) |
| { |
| struct intel_bts_synth *intel_bts_synth = |
| container_of(tool, struct intel_bts_synth, dummy_tool); |
| |
| return perf_session__deliver_synth_event(intel_bts_synth->session, |
| event, NULL); |
| } |
| |
| static int intel_bts_synth_event(struct perf_session *session, |
| struct perf_event_attr *attr, u64 id) |
| { |
| struct intel_bts_synth intel_bts_synth; |
| |
| memset(&intel_bts_synth, 0, sizeof(struct intel_bts_synth)); |
| intel_bts_synth.session = session; |
| |
| return perf_event__synthesize_attr(&intel_bts_synth.dummy_tool, attr, 1, |
| &id, intel_bts_event_synth); |
| } |
| |
| static int intel_bts_synth_events(struct intel_bts *bts, |
| struct perf_session *session) |
| { |
| struct perf_evlist *evlist = session->evlist; |
| struct perf_evsel *evsel; |
| struct perf_event_attr attr; |
| bool found = false; |
| u64 id; |
| int err; |
| |
| evlist__for_each(evlist, evsel) { |
| if (evsel->attr.type == bts->pmu_type && evsel->ids) { |
| found = true; |
| break; |
| } |
| } |
| |
| if (!found) { |
| pr_debug("There are no selected events with Intel BTS data\n"); |
| return 0; |
| } |
| |
| memset(&attr, 0, sizeof(struct perf_event_attr)); |
| attr.size = sizeof(struct perf_event_attr); |
| attr.type = PERF_TYPE_HARDWARE; |
| attr.sample_type = evsel->attr.sample_type & PERF_SAMPLE_MASK; |
| attr.sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID | |
| PERF_SAMPLE_PERIOD; |
| attr.sample_type &= ~(u64)PERF_SAMPLE_TIME; |
| attr.sample_type &= ~(u64)PERF_SAMPLE_CPU; |
| attr.exclude_user = evsel->attr.exclude_user; |
| attr.exclude_kernel = evsel->attr.exclude_kernel; |
| attr.exclude_hv = evsel->attr.exclude_hv; |
| attr.exclude_host = evsel->attr.exclude_host; |
| attr.exclude_guest = evsel->attr.exclude_guest; |
| attr.sample_id_all = evsel->attr.sample_id_all; |
| attr.read_format = evsel->attr.read_format; |
| |
| id = evsel->id[0] + 1000000000; |
| if (!id) |
| id = 1; |
| |
| if (bts->synth_opts.branches) { |
| attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS; |
| attr.sample_period = 1; |
| attr.sample_type |= PERF_SAMPLE_ADDR; |
| pr_debug("Synthesizing 'branches' event with id %" PRIu64 " sample type %#" PRIx64 "\n", |
| id, (u64)attr.sample_type); |
| err = intel_bts_synth_event(session, &attr, id); |
| if (err) { |
| pr_err("%s: failed to synthesize 'branches' event type\n", |
| __func__); |
| return err; |
| } |
| bts->sample_branches = true; |
| bts->branches_sample_type = attr.sample_type; |
| bts->branches_id = id; |
| /* |
| * We only use sample types from PERF_SAMPLE_MASK so we can use |
| * __perf_evsel__sample_size() here. |
| */ |
| bts->branches_event_size = sizeof(struct sample_event) + |
| __perf_evsel__sample_size(attr.sample_type); |
| } |
| |
| bts->synth_needs_swap = evsel->needs_swap; |
| |
| return 0; |
| } |
| |
| static const char * const intel_bts_info_fmts[] = { |
| [INTEL_BTS_PMU_TYPE] = " PMU Type %"PRId64"\n", |
| [INTEL_BTS_TIME_SHIFT] = " Time Shift %"PRIu64"\n", |
| [INTEL_BTS_TIME_MULT] = " Time Muliplier %"PRIu64"\n", |
| [INTEL_BTS_TIME_ZERO] = " Time Zero %"PRIu64"\n", |
| [INTEL_BTS_CAP_USER_TIME_ZERO] = " Cap Time Zero %"PRId64"\n", |
| [INTEL_BTS_SNAPSHOT_MODE] = " Snapshot mode %"PRId64"\n", |
| }; |
| |
| static void intel_bts_print_info(u64 *arr, int start, int finish) |
| { |
| int i; |
| |
| if (!dump_trace) |
| return; |
| |
| for (i = start; i <= finish; i++) |
| fprintf(stdout, intel_bts_info_fmts[i], arr[i]); |
| } |
| |
| u64 intel_bts_auxtrace_info_priv[INTEL_BTS_AUXTRACE_PRIV_SIZE]; |
| |
| int intel_bts_process_auxtrace_info(union perf_event *event, |
| struct perf_session *session) |
| { |
| struct auxtrace_info_event *auxtrace_info = &event->auxtrace_info; |
| size_t min_sz = sizeof(u64) * INTEL_BTS_SNAPSHOT_MODE; |
| struct intel_bts *bts; |
| int err; |
| |
| if (auxtrace_info->header.size < sizeof(struct auxtrace_info_event) + |
| min_sz) |
| return -EINVAL; |
| |
| bts = zalloc(sizeof(struct intel_bts)); |
| if (!bts) |
| return -ENOMEM; |
| |
| err = auxtrace_queues__init(&bts->queues); |
| if (err) |
| goto err_free; |
| |
| bts->session = session; |
| bts->machine = &session->machines.host; /* No kvm support */ |
| bts->auxtrace_type = auxtrace_info->type; |
| bts->pmu_type = auxtrace_info->priv[INTEL_BTS_PMU_TYPE]; |
| bts->tc.time_shift = auxtrace_info->priv[INTEL_BTS_TIME_SHIFT]; |
| bts->tc.time_mult = auxtrace_info->priv[INTEL_BTS_TIME_MULT]; |
| bts->tc.time_zero = auxtrace_info->priv[INTEL_BTS_TIME_ZERO]; |
| bts->cap_user_time_zero = |
| auxtrace_info->priv[INTEL_BTS_CAP_USER_TIME_ZERO]; |
| bts->snapshot_mode = auxtrace_info->priv[INTEL_BTS_SNAPSHOT_MODE]; |
| |
| bts->sampling_mode = false; |
| |
| bts->auxtrace.process_event = intel_bts_process_event; |
| bts->auxtrace.process_auxtrace_event = intel_bts_process_auxtrace_event; |
| bts->auxtrace.flush_events = intel_bts_flush; |
| bts->auxtrace.free_events = intel_bts_free_events; |
| bts->auxtrace.free = intel_bts_free; |
| session->auxtrace = &bts->auxtrace; |
| |
| intel_bts_print_info(&auxtrace_info->priv[0], INTEL_BTS_PMU_TYPE, |
| INTEL_BTS_SNAPSHOT_MODE); |
| |
| if (dump_trace) |
| return 0; |
| |
| if (session->itrace_synth_opts && session->itrace_synth_opts->set) |
| bts->synth_opts = *session->itrace_synth_opts; |
| else |
| itrace_synth_opts__set_default(&bts->synth_opts); |
| |
| if (bts->synth_opts.calls) |
| bts->branches_filter |= PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC | |
| PERF_IP_FLAG_TRACE_END; |
| if (bts->synth_opts.returns) |
| bts->branches_filter |= PERF_IP_FLAG_RETURN | |
| PERF_IP_FLAG_TRACE_BEGIN; |
| |
| err = intel_bts_synth_events(bts, session); |
| if (err) |
| goto err_free_queues; |
| |
| err = auxtrace_queues__process_index(&bts->queues, session); |
| if (err) |
| goto err_free_queues; |
| |
| if (bts->queues.populated) |
| bts->data_queued = true; |
| |
| return 0; |
| |
| err_free_queues: |
| auxtrace_queues__free(&bts->queues); |
| session->auxtrace = NULL; |
| err_free: |
| free(bts); |
| return err; |
| } |