diff options
Diffstat (limited to '')
| -rw-r--r-- | tools/perf/util/session.c | 2251 |
1 files changed, 2251 insertions, 0 deletions
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c new file mode 100644 index 000000000..3be1534f1 --- /dev/null +++ b/tools/perf/util/session.c @@ -0,0 +1,2251 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <errno.h> +#include <inttypes.h> +#include <linux/kernel.h> +#include <traceevent/event-parse.h> +#include <api/fs/fs.h> + +#include <byteswap.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/mman.h> + +#include "evlist.h" +#include "evsel.h" +#include "memswap.h" +#include "session.h" +#include "tool.h" +#include "sort.h" +#include "util.h" +#include "cpumap.h" +#include "perf_regs.h" +#include "asm/bug.h" +#include "auxtrace.h" +#include "thread.h" +#include "thread-stack.h" +#include "stat.h" +#include "arch/common.h" + +static int perf_session__deliver_event(struct perf_session *session, + union perf_event *event, + struct perf_tool *tool, + u64 file_offset); + +static int perf_session__open(struct perf_session *session) +{ + struct perf_data *data = session->data; + + if (perf_session__read_header(session) < 0) { + pr_err("incompatible file format (rerun with -v to learn more)\n"); + return -1; + } + + if (perf_data__is_pipe(data)) + return 0; + + if (perf_header__has_feat(&session->header, HEADER_STAT)) + return 0; + + if (!perf_evlist__valid_sample_type(session->evlist)) { + pr_err("non matching sample_type\n"); + return -1; + } + + if (!perf_evlist__valid_sample_id_all(session->evlist)) { + pr_err("non matching sample_id_all\n"); + return -1; + } + + if (!perf_evlist__valid_read_format(session->evlist)) { + pr_err("non matching read_format\n"); + return -1; + } + + return 0; +} + +void perf_session__set_id_hdr_size(struct perf_session *session) +{ + u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); + + machines__set_id_hdr_size(&session->machines, id_hdr_size); +} + +int perf_session__create_kernel_maps(struct perf_session *session) +{ + int ret = machine__create_kernel_maps(&session->machines.host); + + if (ret >= 0) + ret = machines__create_guest_kernel_maps(&session->machines); + return ret; +} + +static void perf_session__destroy_kernel_maps(struct perf_session *session) +{ + machines__destroy_kernel_maps(&session->machines); +} + +static bool perf_session__has_comm_exec(struct perf_session *session) +{ + struct perf_evsel *evsel; + + evlist__for_each_entry(session->evlist, evsel) { + if (evsel->attr.comm_exec) + return true; + } + + return false; +} + +static void perf_session__set_comm_exec(struct perf_session *session) +{ + bool comm_exec = perf_session__has_comm_exec(session); + + machines__set_comm_exec(&session->machines, comm_exec); +} + +static int ordered_events__deliver_event(struct ordered_events *oe, + struct ordered_event *event) +{ + struct perf_session *session = container_of(oe, struct perf_session, + ordered_events); + + return perf_session__deliver_event(session, event->event, + session->tool, event->file_offset); +} + +struct perf_session *perf_session__new(struct perf_data *data, + bool repipe, struct perf_tool *tool) +{ + struct perf_session *session = zalloc(sizeof(*session)); + + if (!session) + goto out; + + session->repipe = repipe; + session->tool = tool; + INIT_LIST_HEAD(&session->auxtrace_index); + machines__init(&session->machines); + ordered_events__init(&session->ordered_events, ordered_events__deliver_event); + + if (data) { + if (perf_data__open(data)) + goto out_delete; + + session->data = data; + + if (perf_data__is_read(data)) { + if (perf_session__open(session) < 0) + goto out_close; + + /* + * set session attributes that are present in perf.data + * but not in pipe-mode. + */ + if (!data->is_pipe) { + perf_session__set_id_hdr_size(session); + perf_session__set_comm_exec(session); + } + } + } else { + session->machines.host.env = &perf_env; + } + + session->machines.host.single_address_space = + perf_env__single_address_space(session->machines.host.env); + + if (!data || perf_data__is_write(data)) { + /* + * In O_RDONLY mode this will be performed when reading the + * kernel MMAP event, in perf_event__process_mmap(). + */ + if (perf_session__create_kernel_maps(session) < 0) + pr_warning("Cannot read kernel map\n"); + } + + /* + * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is + * processed, so perf_evlist__sample_id_all is not meaningful here. + */ + if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps && + tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) { + dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); + tool->ordered_events = false; + } + + return session; + + out_close: + perf_data__close(data); + out_delete: + perf_session__delete(session); + out: + return NULL; +} + +static void perf_session__delete_threads(struct perf_session *session) +{ + machine__delete_threads(&session->machines.host); +} + +void perf_session__delete(struct perf_session *session) +{ + if (session == NULL) + return; + auxtrace__free(session); + auxtrace_index__free(&session->auxtrace_index); + perf_session__destroy_kernel_maps(session); + perf_session__delete_threads(session); + perf_env__exit(&session->header.env); + machines__exit(&session->machines); + if (session->data) + perf_data__close(session->data); + free(session); +} + +static int process_event_synth_tracing_data_stub(struct perf_tool *tool + __maybe_unused, + union perf_event *event + __maybe_unused, + struct perf_session *session + __maybe_unused) +{ + dump_printf(": unhandled!\n"); + return 0; +} + +static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, + struct perf_evlist **pevlist + __maybe_unused) +{ + dump_printf(": unhandled!\n"); + return 0; +} + +static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, + struct perf_evlist **pevlist + __maybe_unused) +{ + if (dump_trace) + perf_event__fprintf_event_update(event, stdout); + + dump_printf(": unhandled!\n"); + return 0; +} + +static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, + struct perf_sample *sample __maybe_unused, + struct perf_evsel *evsel __maybe_unused, + struct machine *machine __maybe_unused) +{ + dump_printf(": unhandled!\n"); + return 0; +} + +static int process_event_stub(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, + struct perf_sample *sample __maybe_unused, + struct machine *machine __maybe_unused) +{ + dump_printf(": unhandled!\n"); + return 0; +} + +static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, + struct ordered_events *oe __maybe_unused) +{ + dump_printf(": unhandled!\n"); + return 0; +} + +static int process_finished_round(struct perf_tool *tool, + union perf_event *event, + struct ordered_events *oe); + +static int skipn(int fd, off_t n) +{ + char buf[4096]; + ssize_t ret; + + while (n > 0) { + ret = read(fd, buf, min(n, (off_t)sizeof(buf))); + if (ret <= 0) + return ret; + n -= ret; + } + + return 0; +} + +static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused, + union perf_event *event, + struct perf_session *session + __maybe_unused) +{ + dump_printf(": unhandled!\n"); + if (perf_data__is_pipe(session->data)) + skipn(perf_data__fd(session->data), event->auxtrace.size); + return event->auxtrace.size; +} + +static int process_event_op2_stub(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, + struct perf_session *session __maybe_unused) +{ + dump_printf(": unhandled!\n"); + return 0; +} + + +static +int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, + struct perf_session *session __maybe_unused) +{ + if (dump_trace) + perf_event__fprintf_thread_map(event, stdout); + + dump_printf(": unhandled!\n"); + return 0; +} + +static +int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, + struct perf_session *session __maybe_unused) +{ + if (dump_trace) + perf_event__fprintf_cpu_map(event, stdout); + + dump_printf(": unhandled!\n"); + return 0; +} + +static +int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, + struct perf_session *session __maybe_unused) +{ + if (dump_trace) + perf_event__fprintf_stat_config(event, stdout); + + dump_printf(": unhandled!\n"); + return 0; +} + +static int process_stat_stub(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, + struct perf_session *perf_session + __maybe_unused) +{ + if (dump_trace) + perf_event__fprintf_stat(event, stdout); + + dump_printf(": unhandled!\n"); + return 0; +} + +static int process_stat_round_stub(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, + struct perf_session *perf_session + __maybe_unused) +{ + if (dump_trace) + perf_event__fprintf_stat_round(event, stdout); + + dump_printf(": unhandled!\n"); + return 0; +} + +void perf_tool__fill_defaults(struct perf_tool *tool) +{ + if (tool->sample == NULL) + tool->sample = process_event_sample_stub; + if (tool->mmap == NULL) + tool->mmap = process_event_stub; + if (tool->mmap2 == NULL) + tool->mmap2 = process_event_stub; + if (tool->comm == NULL) + tool->comm = process_event_stub; + if (tool->namespaces == NULL) + tool->namespaces = process_event_stub; + if (tool->fork == NULL) + tool->fork = process_event_stub; + if (tool->exit == NULL) + tool->exit = process_event_stub; + if (tool->lost == NULL) + tool->lost = perf_event__process_lost; + if (tool->lost_samples == NULL) + tool->lost_samples = perf_event__process_lost_samples; + if (tool->aux == NULL) + tool->aux = perf_event__process_aux; + if (tool->itrace_start == NULL) + tool->itrace_start = perf_event__process_itrace_start; + if (tool->context_switch == NULL) + tool->context_switch = perf_event__process_switch; + if (tool->read == NULL) + tool->read = process_event_sample_stub; + if (tool->throttle == NULL) + tool->throttle = process_event_stub; + if (tool->unthrottle == NULL) + tool->unthrottle = process_event_stub; + if (tool->attr == NULL) + tool->attr = process_event_synth_attr_stub; + if (tool->event_update == NULL) + tool->event_update = process_event_synth_event_update_stub; + if (tool->tracing_data == NULL) + tool->tracing_data = process_event_synth_tracing_data_stub; + if (tool->build_id == NULL) + tool->build_id = process_event_op2_stub; + if (tool->finished_round == NULL) { + if (tool->ordered_events) + tool->finished_round = process_finished_round; + else + tool->finished_round = process_finished_round_stub; + } + if (tool->id_index == NULL) + tool->id_index = process_event_op2_stub; + if (tool->auxtrace_info == NULL) + tool->auxtrace_info = process_event_op2_stub; + if (tool->auxtrace == NULL) + tool->auxtrace = process_event_auxtrace_stub; + if (tool->auxtrace_error == NULL) + tool->auxtrace_error = process_event_op2_stub; + if (tool->thread_map == NULL) + tool->thread_map = process_event_thread_map_stub; + if (tool->cpu_map == NULL) + tool->cpu_map = process_event_cpu_map_stub; + if (tool->stat_config == NULL) + tool->stat_config = process_event_stat_config_stub; + if (tool->stat == NULL) + tool->stat = process_stat_stub; + if (tool->stat_round == NULL) + tool->stat_round = process_stat_round_stub; + if (tool->time_conv == NULL) + tool->time_conv = process_event_op2_stub; + if (tool->feature == NULL) + tool->feature = process_event_op2_stub; +} + +static void swap_sample_id_all(union perf_event *event, void *data) +{ + void *end = (void *) event + event->header.size; + int size = end - data; + + BUG_ON(size % sizeof(u64)); + mem_bswap_64(data, size); +} + +static void perf_event__all64_swap(union perf_event *event, + bool sample_id_all __maybe_unused) +{ + struct perf_event_header *hdr = &event->header; + mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); +} + +static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) +{ + event->comm.pid = bswap_32(event->comm.pid); + event->comm.tid = bswap_32(event->comm.tid); + + if (sample_id_all) { + void *data = &event->comm.comm; + + data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); + swap_sample_id_all(event, data); + } +} + +static void perf_event__mmap_swap(union perf_event *event, + bool sample_id_all) +{ + event->mmap.pid = bswap_32(event->mmap.pid); + event->mmap.tid = bswap_32(event->mmap.tid); + event->mmap.start = bswap_64(event->mmap.start); + event->mmap.len = bswap_64(event->mmap.len); + event->mmap.pgoff = bswap_64(event->mmap.pgoff); + + if (sample_id_all) { + void *data = &event->mmap.filename; + + data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); + swap_sample_id_all(event, data); + } +} + +static void perf_event__mmap2_swap(union perf_event *event, + bool sample_id_all) +{ + event->mmap2.pid = bswap_32(event->mmap2.pid); + event->mmap2.tid = bswap_32(event->mmap2.tid); + event->mmap2.start = bswap_64(event->mmap2.start); + event->mmap2.len = bswap_64(event->mmap2.len); + event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); + event->mmap2.maj = bswap_32(event->mmap2.maj); + event->mmap2.min = bswap_32(event->mmap2.min); + event->mmap2.ino = bswap_64(event->mmap2.ino); + event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation); + + if (sample_id_all) { + void *data = &event->mmap2.filename; + + data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); + swap_sample_id_all(event, data); + } +} +static void perf_event__task_swap(union perf_event *event, bool sample_id_all) +{ + event->fork.pid = bswap_32(event->fork.pid); + event->fork.tid = bswap_32(event->fork.tid); + event->fork.ppid = bswap_32(event->fork.ppid); + event->fork.ptid = bswap_32(event->fork.ptid); + event->fork.time = bswap_64(event->fork.time); + + if (sample_id_all) + swap_sample_id_all(event, &event->fork + 1); +} + +static void perf_event__read_swap(union perf_event *event, bool sample_id_all) +{ + event->read.pid = bswap_32(event->read.pid); + event->read.tid = bswap_32(event->read.tid); + event->read.value = bswap_64(event->read.value); + event->read.time_enabled = bswap_64(event->read.time_enabled); + event->read.time_running = bswap_64(event->read.time_running); + event->read.id = bswap_64(event->read.id); + + if (sample_id_all) + swap_sample_id_all(event, &event->read + 1); +} + +static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) +{ + event->aux.aux_offset = bswap_64(event->aux.aux_offset); + event->aux.aux_size = bswap_64(event->aux.aux_size); + event->aux.flags = bswap_64(event->aux.flags); + + if (sample_id_all) + swap_sample_id_all(event, &event->aux + 1); +} + +static void perf_event__itrace_start_swap(union perf_event *event, + bool sample_id_all) +{ + event->itrace_start.pid = bswap_32(event->itrace_start.pid); + event->itrace_start.tid = bswap_32(event->itrace_start.tid); + + if (sample_id_all) + swap_sample_id_all(event, &event->itrace_start + 1); +} + +static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) +{ + if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { + event->context_switch.next_prev_pid = + bswap_32(event->context_switch.next_prev_pid); + event->context_switch.next_prev_tid = + bswap_32(event->context_switch.next_prev_tid); + } + + if (sample_id_all) + swap_sample_id_all(event, &event->context_switch + 1); +} + +static void perf_event__throttle_swap(union perf_event *event, + bool sample_id_all) +{ + event->throttle.time = bswap_64(event->throttle.time); + event->throttle.id = bswap_64(event->throttle.id); + event->throttle.stream_id = bswap_64(event->throttle.stream_id); + + if (sample_id_all) + swap_sample_id_all(event, &event->throttle + 1); +} + +static u8 revbyte(u8 b) +{ + int rev = (b >> 4) | ((b & 0xf) << 4); + rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); + rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); + return (u8) rev; +} + +/* + * XXX this is hack in attempt to carry flags bitfield + * through endian village. ABI says: + * + * Bit-fields are allocated from right to left (least to most significant) + * on little-endian implementations and from left to right (most to least + * significant) on big-endian implementations. + * + * The above seems to be byte specific, so we need to reverse each + * byte of the bitfield. 'Internet' also says this might be implementation + * specific and we probably need proper fix and carry perf_event_attr + * bitfield flags in separate data file FEAT_ section. Thought this seems + * to work for now. + */ +static void swap_bitfield(u8 *p, unsigned len) +{ + unsigned i; + + for (i = 0; i < len; i++) { + *p = revbyte(*p); + p++; + } +} + +/* exported for swapping attributes in file header */ +void perf_event__attr_swap(struct perf_event_attr *attr) +{ + attr->type = bswap_32(attr->type); + attr->size = bswap_32(attr->size); + +#define bswap_safe(f, n) \ + (attr->size > (offsetof(struct perf_event_attr, f) + \ + sizeof(attr->f) * (n))) +#define bswap_field(f, sz) \ +do { \ + if (bswap_safe(f, 0)) \ + attr->f = bswap_##sz(attr->f); \ +} while(0) +#define bswap_field_16(f) bswap_field(f, 16) +#define bswap_field_32(f) bswap_field(f, 32) +#define bswap_field_64(f) bswap_field(f, 64) + + bswap_field_64(config); + bswap_field_64(sample_period); + bswap_field_64(sample_type); + bswap_field_64(read_format); + bswap_field_32(wakeup_events); + bswap_field_32(bp_type); + bswap_field_64(bp_addr); + bswap_field_64(bp_len); + bswap_field_64(branch_sample_type); + bswap_field_64(sample_regs_user); + bswap_field_32(sample_stack_user); + bswap_field_32(aux_watermark); + bswap_field_16(sample_max_stack); + + /* + * After read_format are bitfields. Check read_format because + * we are unable to use offsetof on bitfield. + */ + if (bswap_safe(read_format, 1)) + swap_bitfield((u8 *) (&attr->read_format + 1), + sizeof(u64)); +#undef bswap_field_64 +#undef bswap_field_32 +#undef bswap_field +#undef bswap_safe +} + +static void perf_event__hdr_attr_swap(union perf_event *event, + bool sample_id_all __maybe_unused) +{ + size_t size; + + perf_event__attr_swap(&event->attr.attr); + + size = event->header.size; + size -= (void *)&event->attr.id - (void *)event; + mem_bswap_64(event->attr.id, size); +} + +static void perf_event__event_update_swap(union perf_event *event, + bool sample_id_all __maybe_unused) +{ + event->event_update.type = bswap_64(event->event_update.type); + event->event_update.id = bswap_64(event->event_update.id); +} + +static void perf_event__event_type_swap(union perf_event *event, + bool sample_id_all __maybe_unused) +{ + event->event_type.event_type.event_id = + bswap_64(event->event_type.event_type.event_id); +} + +static void perf_event__tracing_data_swap(union perf_event *event, + bool sample_id_all __maybe_unused) +{ + event->tracing_data.size = bswap_32(event->tracing_data.size); +} + +static void perf_event__auxtrace_info_swap(union perf_event *event, + bool sample_id_all __maybe_unused) +{ + size_t size; + + event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); + + size = event->header.size; + size -= (void *)&event->auxtrace_info.priv - (void *)event; + mem_bswap_64(event->auxtrace_info.priv, size); +} + +static void perf_event__auxtrace_swap(union perf_event *event, + bool sample_id_all __maybe_unused) +{ + event->auxtrace.size = bswap_64(event->auxtrace.size); + event->auxtrace.offset = bswap_64(event->auxtrace.offset); + event->auxtrace.reference = bswap_64(event->auxtrace.reference); + event->auxtrace.idx = bswap_32(event->auxtrace.idx); + event->auxtrace.tid = bswap_32(event->auxtrace.tid); + event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); +} + +static void perf_event__auxtrace_error_swap(union perf_event *event, + bool sample_id_all __maybe_unused) +{ + event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); + event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); + event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); + event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); + event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); + event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); +} + +static void perf_event__thread_map_swap(union perf_event *event, + bool sample_id_all __maybe_unused) +{ + unsigned i; + + event->thread_map.nr = bswap_64(event->thread_map.nr); + + for (i = 0; i < event->thread_map.nr; i++) + event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); +} + +static void perf_event__cpu_map_swap(union perf_event *event, + bool sample_id_all __maybe_unused) +{ + struct cpu_map_data *data = &event->cpu_map.data; + struct cpu_map_entries *cpus; + struct cpu_map_mask *mask; + unsigned i; + + data->type = bswap_64(data->type); + + switch (data->type) { + case PERF_CPU_MAP__CPUS: + cpus = (struct cpu_map_entries *)data->data; + + cpus->nr = bswap_16(cpus->nr); + + for (i = 0; i < cpus->nr; i++) + cpus->cpu[i] = bswap_16(cpus->cpu[i]); + break; + case PERF_CPU_MAP__MASK: + mask = (struct cpu_map_mask *) data->data; + + mask->nr = bswap_16(mask->nr); + mask->long_size = bswap_16(mask->long_size); + + switch (mask->long_size) { + case 4: mem_bswap_32(&mask->mask, mask->nr); break; + case 8: mem_bswap_64(&mask->mask, mask->nr); break; + default: + pr_err("cpu_map swap: unsupported long size\n"); + } + default: + break; + } +} + +static void perf_event__stat_config_swap(union perf_event *event, + bool sample_id_all __maybe_unused) +{ + u64 size; + + size = event->stat_config.nr * sizeof(event->stat_config.data[0]); + size += 1; /* nr item itself */ + mem_bswap_64(&event->stat_config.nr, size); +} + +static void perf_event__stat_swap(union perf_event *event, + bool sample_id_all __maybe_unused) +{ + event->stat.id = bswap_64(event->stat.id); + event->stat.thread = bswap_32(event->stat.thread); + event->stat.cpu = bswap_32(event->stat.cpu); + event->stat.val = bswap_64(event->stat.val); + event->stat.ena = bswap_64(event->stat.ena); + event->stat.run = bswap_64(event->stat.run); +} + +static void perf_event__stat_round_swap(union perf_event *event, + bool sample_id_all __maybe_unused) +{ + event->stat_round.type = bswap_64(event->stat_round.type); + event->stat_round.time = bswap_64(event->stat_round.time); +} + +typedef void (*perf_event__swap_op)(union perf_event *event, + bool sample_id_all); + +static perf_event__swap_op perf_event__swap_ops[] = { + [PERF_RECORD_MMAP] = perf_event__mmap_swap, + [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, + [PERF_RECORD_COMM] = perf_event__comm_swap, + [PERF_RECORD_FORK] = perf_event__task_swap, + [PERF_RECORD_EXIT] = perf_event__task_swap, + [PERF_RECORD_LOST] = perf_event__all64_swap, + [PERF_RECORD_READ] = perf_event__read_swap, + [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, + [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, + [PERF_RECORD_SAMPLE] = perf_event__all64_swap, + [PERF_RECORD_AUX] = perf_event__aux_swap, + [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, + [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, + [PERF_RECORD_SWITCH] = perf_event__switch_swap, + [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, + [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, + [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, + [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, + [PERF_RECORD_HEADER_BUILD_ID] = NULL, + [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, + [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, + [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, + [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, + [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, + [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, + [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, + [PERF_RECORD_STAT] = perf_event__stat_swap, + [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, + [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, + [PERF_RECORD_TIME_CONV] = perf_event__all64_swap, + [PERF_RECORD_HEADER_MAX] = NULL, +}; + +/* + * When perf record finishes a pass on every buffers, it records this pseudo + * event. + * We record the max timestamp t found in the pass n. + * Assuming these timestamps are monotonic across cpus, we know that if + * a buffer still has events with timestamps below t, they will be all + * available and then read in the pass n + 1. + * Hence when we start to read the pass n + 2, we can safely flush every + * events with timestamps below t. + * + * ============ PASS n ================= + * CPU 0 | CPU 1 + * | + * cnt1 timestamps | cnt2 timestamps + * 1 | 2 + * 2 | 3 + * - | 4 <--- max recorded + * + * ============ PASS n + 1 ============== + * CPU 0 | CPU 1 + * | + * cnt1 timestamps | cnt2 timestamps + * 3 | 5 + * 4 | 6 + * 5 | 7 <---- max recorded + * + * Flush every events below timestamp 4 + * + * ============ PASS n + 2 ============== + * CPU 0 | CPU 1 + * | + * cnt1 timestamps | cnt2 timestamps + * 6 | 8 + * 7 | 9 + * - | 10 + * + * Flush every events below timestamp 7 + * etc... + */ +static int process_finished_round(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, + struct ordered_events *oe) +{ + if (dump_trace) + fprintf(stdout, "\n"); + return ordered_events__flush(oe, OE_FLUSH__ROUND); +} + +int perf_session__queue_event(struct perf_session *s, union perf_event *event, + u64 timestamp, u64 file_offset) +{ + return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset); +} + +static void callchain__lbr_callstack_printf(struct perf_sample *sample) +{ + struct ip_callchain *callchain = sample->callchain; + struct branch_stack *lbr_stack = sample->branch_stack; + u64 kernel_callchain_nr = callchain->nr; + unsigned int i; + + for (i = 0; i < kernel_callchain_nr; i++) { + if (callchain->ips[i] == PERF_CONTEXT_USER) + break; + } + + if ((i != kernel_callchain_nr) && lbr_stack->nr) { + u64 total_nr; + /* + * LBR callstack can only get user call chain, + * i is kernel call chain number, + * 1 is PERF_CONTEXT_USER. + * + * The user call chain is stored in LBR registers. + * LBR are pair registers. The caller is stored + * in "from" register, while the callee is stored + * in "to" register. + * For example, there is a call stack + * "A"->"B"->"C"->"D". + * The LBR registers will recorde like + * "C"->"D", "B"->"C", "A"->"B". + * So only the first "to" register and all "from" + * registers are needed to construct the whole stack. + */ + total_nr = i + 1 + lbr_stack->nr + 1; + kernel_callchain_nr = i + 1; + + printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); + + for (i = 0; i < kernel_callchain_nr; i++) + printf("..... %2d: %016" PRIx64 "\n", + i, callchain->ips[i]); + + printf("..... %2d: %016" PRIx64 "\n", + (int)(kernel_callchain_nr), lbr_stack->entries[0].to); + for (i = 0; i < lbr_stack->nr; i++) + printf("..... %2d: %016" PRIx64 "\n", + (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from); + } +} + +static void callchain__printf(struct perf_evsel *evsel, + struct perf_sample *sample) +{ + unsigned int i; + struct ip_callchain *callchain = sample->callchain; + + if (perf_evsel__has_branch_callstack(evsel)) + callchain__lbr_callstack_printf(sample); + + printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); + + for (i = 0; i < callchain->nr; i++) + printf("..... %2d: %016" PRIx64 "\n", + i, callchain->ips[i]); +} + +static void branch_stack__printf(struct perf_sample *sample) +{ + uint64_t i; + + printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); + + for (i = 0; i < sample->branch_stack->nr; i++) { + struct branch_entry *e = &sample->branch_stack->entries[i]; + + printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n", + i, e->from, e->to, + (unsigned short)e->flags.cycles, + e->flags.mispred ? "M" : " ", + e->flags.predicted ? "P" : " ", + e->flags.abort ? "A" : " ", + e->flags.in_tx ? "T" : " ", + (unsigned)e->flags.reserved); + } +} + +static void regs_dump__printf(u64 mask, u64 *regs) +{ + unsigned rid, i = 0; + + for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { + u64 val = regs[i++]; + + printf(".... %-5s 0x%" PRIx64 "\n", + perf_reg_name(rid), val); + } +} + +static const char *regs_abi[] = { + [PERF_SAMPLE_REGS_ABI_NONE] = "none", + [PERF_SAMPLE_REGS_ABI_32] = "32-bit", + [PERF_SAMPLE_REGS_ABI_64] = "64-bit", +}; + +static inline const char *regs_dump_abi(struct regs_dump *d) +{ + if (d->abi > PERF_SAMPLE_REGS_ABI_64) + return "unknown"; + + return regs_abi[d->abi]; +} + +static void regs__printf(const char *type, struct regs_dump *regs) +{ + u64 mask = regs->mask; + + printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", + type, + mask, + regs_dump_abi(regs)); + + regs_dump__printf(mask, regs->regs); +} + +static void regs_user__printf(struct perf_sample *sample) +{ + struct regs_dump *user_regs = &sample->user_regs; + + if (user_regs->regs) + regs__printf("user", user_regs); +} + +static void regs_intr__printf(struct perf_sample *sample) +{ + struct regs_dump *intr_regs = &sample->intr_regs; + + if (intr_regs->regs) + regs__printf("intr", intr_regs); +} + +static void stack_user__printf(struct stack_dump *dump) +{ + printf("... ustack: size %" PRIu64 ", offset 0x%x\n", + dump->size, dump->offset); +} + +static void perf_evlist__print_tstamp(struct perf_evlist *evlist, + union perf_event *event, + struct perf_sample *sample) +{ + u64 sample_type = __perf_evlist__combined_sample_type(evlist); + + if (event->header.type != PERF_RECORD_SAMPLE && + !perf_evlist__sample_id_all(evlist)) { + fputs("-1 -1 ", stdout); + return; + } + + if ((sample_type & PERF_SAMPLE_CPU)) + printf("%u ", sample->cpu); + + if (sample_type & PERF_SAMPLE_TIME) + printf("%" PRIu64 " ", sample->time); +} + +static void sample_read__printf(struct perf_sample *sample, u64 read_format) +{ + printf("... sample_read:\n"); + + if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) + printf("...... time enabled %016" PRIx64 "\n", + sample->read.time_enabled); + + if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) + printf("...... time running %016" PRIx64 "\n", + sample->read.time_running); + + if (read_format & PERF_FORMAT_GROUP) { + u64 i; + + printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); + + for (i = 0; i < sample->read.group.nr; i++) { + struct sample_read_value *value; + + value = &sample->read.group.values[i]; + printf("..... id %016" PRIx64 + ", value %016" PRIx64 "\n", + value->id, value->value); + } + } else + printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", + sample->read.one.id, sample->read.one.value); +} + +static void dump_event(struct perf_evlist *evlist, union perf_event *event, + u64 file_offset, struct perf_sample *sample) +{ + if (!dump_trace) + return; + + printf("\n%#" PRIx64 " [%#x]: event: %d\n", + file_offset, event->header.size, event->header.type); + + trace_event(event); + + if (sample) + perf_evlist__print_tstamp(evlist, event, sample); + + printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, + event->header.size, perf_event__name(event->header.type)); +} + +static void dump_sample(struct perf_evsel *evsel, union perf_event *event, + struct perf_sample *sample) +{ + u64 sample_type; + + if (!dump_trace) + return; + + printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", + event->header.misc, sample->pid, sample->tid, sample->ip, + sample->period, sample->addr); + + sample_type = evsel->attr.sample_type; + + if (evsel__has_callchain(evsel)) + callchain__printf(evsel, sample); + + if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel)) + branch_stack__printf(sample); + + if (sample_type & PERF_SAMPLE_REGS_USER) + regs_user__printf(sample); + + if (sample_type & PERF_SAMPLE_REGS_INTR) + regs_intr__printf(sample); + + if (sample_type & PERF_SAMPLE_STACK_USER) + stack_user__printf(&sample->user_stack); + + if (sample_type & PERF_SAMPLE_WEIGHT) + printf("... weight: %" PRIu64 "\n", sample->weight); + + if (sample_type & PERF_SAMPLE_DATA_SRC) + printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); + + if (sample_type & PERF_SAMPLE_PHYS_ADDR) + printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr); + + if (sample_type & PERF_SAMPLE_TRANSACTION) + printf("... transaction: %" PRIx64 "\n", sample->transaction); + + if (sample_type & PERF_SAMPLE_READ) + sample_read__printf(sample, evsel->attr.read_format); +} + +static void dump_read(struct perf_evsel *evsel, union perf_event *event) +{ + struct read_event *read_event = &event->read; + u64 read_format; + + if (!dump_trace) + return; + + printf(": %d %d %s %" PRIu64 "\n", event->read.pid, event->read.tid, + evsel ? perf_evsel__name(evsel) : "FAIL", + event->read.value); + + if (!evsel) + return; + + read_format = evsel->attr.read_format; + + if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) + printf("... time enabled : %" PRIu64 "\n", read_event->time_enabled); + + if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) + printf("... time running : %" PRIu64 "\n", read_event->time_running); + + if (read_format & PERF_FORMAT_ID) + printf("... id : %" PRIu64 "\n", read_event->id); +} + +static struct machine *machines__find_for_cpumode(struct machines *machines, + union perf_event *event, + struct perf_sample *sample) +{ + struct machine *machine; + + if (perf_guest && + ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || + (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { + u32 pid; + + if (event->header.type == PERF_RECORD_MMAP + || event->header.type == PERF_RECORD_MMAP2) + pid = event->mmap.pid; + else + pid = sample->pid; + + machine = machines__find(machines, pid); + if (!machine) + machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); + return machine; + } + + return &machines->host; +} + +static int deliver_sample_value(struct perf_evlist *evlist, + struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample, + struct sample_read_value *v, + struct machine *machine) +{ + struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); + + if (sid) { + sample->id = v->id; + sample->period = v->value - sid->period; + sid->period = v->value; + } + + if (!sid || sid->evsel == NULL) { + ++evlist->stats.nr_unknown_id; + return 0; + } + + return tool->sample(tool, event, sample, sid->evsel, machine); +} + +static int deliver_sample_group(struct perf_evlist *evlist, + struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample, + struct machine *machine) +{ + int ret = -EINVAL; + u64 i; + + for (i = 0; i < sample->read.group.nr; i++) { + ret = deliver_sample_value(evlist, tool, event, sample, + &sample->read.group.values[i], + machine); + if (ret) + break; + } + + return ret; +} + +static int + perf_evlist__deliver_sample(struct perf_evlist *evlist, + struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample, + struct perf_evsel *evsel, + struct machine *machine) +{ + /* We know evsel != NULL. */ + u64 sample_type = evsel->attr.sample_type; + u64 read_format = evsel->attr.read_format; + + /* Standard sample delivery. */ + if (!(sample_type & PERF_SAMPLE_READ)) + return tool->sample(tool, event, sample, evsel, machine); + + /* For PERF_SAMPLE_READ we have either single or group mode. */ + if (read_format & PERF_FORMAT_GROUP) + return deliver_sample_group(evlist, tool, event, sample, + machine); + else + return deliver_sample_value(evlist, tool, event, sample, + &sample->read.one, machine); +} + +static int machines__deliver_event(struct machines *machines, + struct perf_evlist *evlist, + union perf_event *event, + struct perf_sample *sample, + struct perf_tool *tool, u64 file_offset) +{ + struct perf_evsel *evsel; + struct machine *machine; + + dump_event(evlist, event, file_offset, sample); + + evsel = perf_evlist__id2evsel(evlist, sample->id); + + machine = machines__find_for_cpumode(machines, event, sample); + + switch (event->header.type) { + case PERF_RECORD_SAMPLE: + if (evsel == NULL) { + ++evlist->stats.nr_unknown_id; + return 0; + } + dump_sample(evsel, event, sample); + if (machine == NULL) { + ++evlist->stats.nr_unprocessable_samples; + return 0; + } + return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); + case PERF_RECORD_MMAP: + return tool->mmap(tool, event, sample, machine); + case PERF_RECORD_MMAP2: + if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) + ++evlist->stats.nr_proc_map_timeout; + return tool->mmap2(tool, event, sample, machine); + case PERF_RECORD_COMM: + return tool->comm(tool, event, sample, machine); + case PERF_RECORD_NAMESPACES: + return tool->namespaces(tool, event, sample, machine); + case PERF_RECORD_FORK: + return tool->fork(tool, event, sample, machine); + case PERF_RECORD_EXIT: + return tool->exit(tool, event, sample, machine); + case PERF_RECORD_LOST: + if (tool->lost == perf_event__process_lost) + evlist->stats.total_lost += event->lost.lost; + return tool->lost(tool, event, sample, machine); + case PERF_RECORD_LOST_SAMPLES: + if (tool->lost_samples == perf_event__process_lost_samples) + evlist->stats.total_lost_samples += event->lost_samples.lost; + return tool->lost_samples(tool, event, sample, machine); + case PERF_RECORD_READ: + dump_read(evsel, event); + return tool->read(tool, event, sample, evsel, machine); + case PERF_RECORD_THROTTLE: + return tool->throttle(tool, event, sample, machine); + case PERF_RECORD_UNTHROTTLE: + return tool->unthrottle(tool, event, sample, machine); + case PERF_RECORD_AUX: + if (tool->aux == perf_event__process_aux) { + if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) + evlist->stats.total_aux_lost += 1; + if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) + evlist->stats.total_aux_partial += 1; + } + return tool->aux(tool, event, sample, machine); + case PERF_RECORD_ITRACE_START: + return tool->itrace_start(tool, event, sample, machine); + case PERF_RECORD_SWITCH: + case PERF_RECORD_SWITCH_CPU_WIDE: + return tool->context_switch(tool, event, sample, machine); + default: + ++evlist->stats.nr_unknown_events; + return -1; + } +} + +static int perf_session__deliver_event(struct perf_session *session, + union perf_event *event, + struct perf_tool *tool, + u64 file_offset) +{ + struct perf_sample sample; + int ret; + + ret = perf_evlist__parse_sample(session->evlist, event, &sample); + if (ret) { + pr_err("Can't parse sample, err = %d\n", ret); + return ret; + } + + ret = auxtrace__process_event(session, event, &sample, tool); + if (ret < 0) + return ret; + if (ret > 0) + return 0; + + return machines__deliver_event(&session->machines, session->evlist, + event, &sample, tool, file_offset); +} + +static s64 perf_session__process_user_event(struct perf_session *session, + union perf_event *event, + u64 file_offset) +{ + struct ordered_events *oe = &session->ordered_events; + struct perf_tool *tool = session->tool; + struct perf_sample sample = { .time = 0, }; + int fd = perf_data__fd(session->data); + int err; + + dump_event(session->evlist, event, file_offset, &sample); + + /* These events are processed right away */ + switch (event->header.type) { + case PERF_RECORD_HEADER_ATTR: + err = tool->attr(tool, event, &session->evlist); + if (err == 0) { + perf_session__set_id_hdr_size(session); + perf_session__set_comm_exec(session); + } + return err; + case PERF_RECORD_EVENT_UPDATE: + return tool->event_update(tool, event, &session->evlist); + case PERF_RECORD_HEADER_EVENT_TYPE: + /* + * Depreceated, but we need to handle it for sake + * of old data files create in pipe mode. + */ + return 0; + case PERF_RECORD_HEADER_TRACING_DATA: + /* setup for reading amidst mmap */ + lseek(fd, file_offset, SEEK_SET); + return tool->tracing_data(tool, event, session); + case PERF_RECORD_HEADER_BUILD_ID: + return tool->build_id(tool, event, session); + case PERF_RECORD_FINISHED_ROUND: + return tool->finished_round(tool, event, oe); + case PERF_RECORD_ID_INDEX: + return tool->id_index(tool, event, session); + case PERF_RECORD_AUXTRACE_INFO: + return tool->auxtrace_info(tool, event, session); + case PERF_RECORD_AUXTRACE: + /* setup for reading amidst mmap */ + lseek(fd, file_offset + event->header.size, SEEK_SET); + return tool->auxtrace(tool, event, session); + case PERF_RECORD_AUXTRACE_ERROR: + perf_session__auxtrace_error_inc(session, event); + return tool->auxtrace_error(tool, event, session); + case PERF_RECORD_THREAD_MAP: + return tool->thread_map(tool, event, session); + case PERF_RECORD_CPU_MAP: + return tool->cpu_map(tool, event, session); + case PERF_RECORD_STAT_CONFIG: + return tool->stat_config(tool, event, session); + case PERF_RECORD_STAT: + return tool->stat(tool, event, session); + case PERF_RECORD_STAT_ROUND: + return tool->stat_round(tool, event, session); + case PERF_RECORD_TIME_CONV: + session->time_conv = event->time_conv; + return tool->time_conv(tool, event, session); + case PERF_RECORD_HEADER_FEATURE: + return tool->feature(tool, event, session); + default: + return -EINVAL; + } +} + +int perf_session__deliver_synth_event(struct perf_session *session, + union perf_event *event, + struct perf_sample *sample) +{ + struct perf_evlist *evlist = session->evlist; + struct perf_tool *tool = session->tool; + + events_stats__inc(&evlist->stats, event->header.type); + + if (event->header.type >= PERF_RECORD_USER_TYPE_START) + return perf_session__process_user_event(session, event, 0); + + return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); +} + +static void event_swap(union perf_event *event, bool sample_id_all) +{ + perf_event__swap_op swap; + + swap = perf_event__swap_ops[event->header.type]; + if (swap) + swap(event, sample_id_all); +} + +int perf_session__peek_event(struct perf_session *session, off_t file_offset, + void *buf, size_t buf_sz, + union perf_event **event_ptr, + struct perf_sample *sample) +{ + union perf_event *event; + size_t hdr_sz, rest; + int fd; + + if (session->one_mmap && !session->header.needs_swap) { + event = file_offset - session->one_mmap_offset + + session->one_mmap_addr; + goto out_parse_sample; + } + + if (perf_data__is_pipe(session->data)) + return -1; + + fd = perf_data__fd(session->data); + hdr_sz = sizeof(struct perf_event_header); + + if (buf_sz < hdr_sz) + return -1; + + if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || + readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) + return -1; + + event = (union perf_event *)buf; + + if (session->header.needs_swap) + perf_event_header__bswap(&event->header); + + if (event->header.size < hdr_sz || event->header.size > buf_sz) + return -1; + + buf += hdr_sz; + rest = event->header.size - hdr_sz; + + if (readn(fd, buf, rest) != (ssize_t)rest) + return -1; + + if (session->header.needs_swap) + event_swap(event, perf_evlist__sample_id_all(session->evlist)); + +out_parse_sample: + + if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && + perf_evlist__parse_sample(session->evlist, event, sample)) + return -1; + + *event_ptr = event; + + return 0; +} + +static s64 perf_session__process_event(struct perf_session *session, + union perf_event *event, u64 file_offset) +{ + struct perf_evlist *evlist = session->evlist; + struct perf_tool *tool = session->tool; + int ret; + + if (session->header.needs_swap) + event_swap(event, perf_evlist__sample_id_all(evlist)); + + if (event->header.type >= PERF_RECORD_HEADER_MAX) + return -EINVAL; + + events_stats__inc(&evlist->stats, event->header.type); + + if (event->header.type >= PERF_RECORD_USER_TYPE_START) + return perf_session__process_user_event(session, event, file_offset); + + if (tool->ordered_events) { + u64 timestamp = -1ULL; + + ret = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp); + if (ret && ret != -1) + return ret; + + ret = perf_session__queue_event(session, event, timestamp, file_offset); + if (ret != -ETIME) + return ret; + } + + return perf_session__deliver_event(session, event, tool, file_offset); +} + +void perf_event_header__bswap(struct perf_event_header *hdr) +{ + hdr->type = bswap_32(hdr->type); + hdr->misc = bswap_16(hdr->misc); + hdr->size = bswap_16(hdr->size); +} + +struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) +{ + return machine__findnew_thread(&session->machines.host, -1, pid); +} + +int perf_session__register_idle_thread(struct perf_session *session) +{ + struct thread *thread; + int err = 0; + + thread = machine__findnew_thread(&session->machines.host, 0, 0); + if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { + pr_err("problem inserting idle task.\n"); + err = -1; + } + + if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) { + pr_err("problem inserting idle task.\n"); + err = -1; + } + + /* machine__findnew_thread() got the thread, so put it */ + thread__put(thread); + return err; +} + +static void +perf_session__warn_order(const struct perf_session *session) +{ + const struct ordered_events *oe = &session->ordered_events; + struct perf_evsel *evsel; + bool should_warn = true; + + evlist__for_each_entry(session->evlist, evsel) { + if (evsel->attr.write_backward) + should_warn = false; + } + + if (!should_warn) + return; + if (oe->nr_unordered_events != 0) + ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); +} + +static void perf_session__warn_about_errors(const struct perf_session *session) +{ + const struct events_stats *stats = &session->evlist->stats; + + if (session->tool->lost == perf_event__process_lost && + stats->nr_events[PERF_RECORD_LOST] != 0) { + ui__warning("Processed %d events and lost %d chunks!\n\n" + "Check IO/CPU overload!\n\n", + stats->nr_events[0], + stats->nr_events[PERF_RECORD_LOST]); + } + + if (session->tool->lost_samples == perf_event__process_lost_samples) { + double drop_rate; + + drop_rate = (double)stats->total_lost_samples / + (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); + if (drop_rate > 0.05) { + ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n", + stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, + drop_rate * 100.0); + } + } + + if (session->tool->aux == perf_event__process_aux && + stats->total_aux_lost != 0) { + ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", + stats->total_aux_lost, + stats->nr_events[PERF_RECORD_AUX]); + } + + if (session->tool->aux == perf_event__process_aux && + stats->total_aux_partial != 0) { + bool vmm_exclusive = false; + + (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", + &vmm_exclusive); + + ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" + "Are you running a KVM guest in the background?%s\n\n", + stats->total_aux_partial, + stats->nr_events[PERF_RECORD_AUX], + vmm_exclusive ? + "\nReloading kvm_intel module with vmm_exclusive=0\n" + "will reduce the gaps to only guest's timeslices." : + ""); + } + + if (stats->nr_unknown_events != 0) { + ui__warning("Found %u unknown events!\n\n" + "Is this an older tool processing a perf.data " + "file generated by a more recent tool?\n\n" + "If that is not the case, consider " + "reporting to linux-kernel@vger.kernel.org.\n\n", + stats->nr_unknown_events); + } + + if (stats->nr_unknown_id != 0) { + ui__warning("%u samples with id not present in the header\n", + stats->nr_unknown_id); + } + + if (stats->nr_invalid_chains != 0) { + ui__warning("Found invalid callchains!\n\n" + "%u out of %u events were discarded for this reason.\n\n" + "Consider reporting to linux-kernel@vger.kernel.org.\n\n", + stats->nr_invalid_chains, + stats->nr_events[PERF_RECORD_SAMPLE]); + } + + if (stats->nr_unprocessable_samples != 0) { + ui__warning("%u unprocessable samples recorded.\n" + "Do you have a KVM guest running and not using 'perf kvm'?\n", + stats->nr_unprocessable_samples); + } + + perf_session__warn_order(session); + + events_stats__auxtrace_error_warn(stats); + + if (stats->nr_proc_map_timeout != 0) { + ui__warning("%d map information files for pre-existing threads were\n" + "not processed, if there are samples for addresses they\n" + "will not be resolved, you may find out which are these\n" + "threads by running with -v and redirecting the output\n" + "to a file.\n" + "The time limit to process proc map is too short?\n" + "Increase it by --proc-map-timeout\n", + stats->nr_proc_map_timeout); + } +} + +static int perf_session__flush_thread_stack(struct thread *thread, + void *p __maybe_unused) +{ + return thread_stack__flush(thread); +} + +static int perf_session__flush_thread_stacks(struct perf_session *session) +{ + return machines__for_each_thread(&session->machines, + perf_session__flush_thread_stack, + NULL); +} + +volatile int session_done; + +static int __perf_session__process_pipe_events(struct perf_session *session) +{ + struct ordered_events *oe = &session->ordered_events; + struct perf_tool *tool = session->tool; + int fd = perf_data__fd(session->data); + union perf_event *event; + uint32_t size, cur_size = 0; + void *buf = NULL; + s64 skip = 0; + u64 head; + ssize_t err; + void *p; + + perf_tool__fill_defaults(tool); + + head = 0; + cur_size = sizeof(union perf_event); + + buf = malloc(cur_size); + if (!buf) + return -errno; + ordered_events__set_copy_on_queue(oe, true); +more: + event = buf; + err = readn(fd, event, sizeof(struct perf_event_header)); + if (err <= 0) { + if (err == 0) + goto done; + + pr_err("failed to read event header\n"); + goto out_err; + } + + if (session->header.needs_swap) + perf_event_header__bswap(&event->header); + + size = event->header.size; + if (size < sizeof(struct perf_event_header)) { + pr_err("bad event header size\n"); + goto out_err; + } + + if (size > cur_size) { + void *new = realloc(buf, size); + if (!new) { + pr_err("failed to allocate memory to read event\n"); + goto out_err; + } + buf = new; + cur_size = size; + event = buf; + } + p = event; + p += sizeof(struct perf_event_header); + + if (size - sizeof(struct perf_event_header)) { + err = readn(fd, p, size - sizeof(struct perf_event_header)); + if (err <= 0) { + if (err == 0) { + pr_err("unexpected end of event stream\n"); + goto done; + } + + pr_err("failed to read event data\n"); + goto out_err; + } + } + + if ((skip = perf_session__process_event(session, event, head)) < 0) { + pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", + head, event->header.size, event->header.type); + err = -EINVAL; + goto out_err; + } + + head += size; + + if (skip > 0) + head += skip; + + if (!session_done()) + goto more; +done: + /* do the final flush for ordered samples */ + err = ordered_events__flush(oe, OE_FLUSH__FINAL); + if (err) + goto out_err; + err = auxtrace__flush_events(session, tool); + if (err) + goto out_err; + err = perf_session__flush_thread_stacks(session); +out_err: + free(buf); + if (!tool->no_warn) + perf_session__warn_about_errors(session); + ordered_events__free(&session->ordered_events); + auxtrace__free_events(session); + return err; +} + +static union perf_event * +fetch_mmaped_event(struct perf_session *session, + u64 head, size_t mmap_size, char *buf) +{ + union perf_event *event; + + /* + * Ensure we have enough space remaining to read + * the size of the event in the headers. + */ + if (head + sizeof(event->header) > mmap_size) + return NULL; + + event = (union perf_event *)(buf + head); + + if (session->header.needs_swap) + perf_event_header__bswap(&event->header); + + if (head + event->header.size > mmap_size) { + /* We're not fetching the event so swap back again */ + if (session->header.needs_swap) + perf_event_header__bswap(&event->header); + return NULL; + } + + return event; +} + +/* + * On 64bit we can mmap the data file in one go. No need for tiny mmap + * slices. On 32bit we use 32MB. + */ +#if BITS_PER_LONG == 64 +#define MMAP_SIZE ULLONG_MAX +#define NUM_MMAPS 1 +#else +#define MMAP_SIZE (32 * 1024 * 1024ULL) +#define NUM_MMAPS 128 +#endif + +static int __perf_session__process_events(struct perf_session *session, + u64 data_offset, u64 data_size, + u64 file_size) +{ + struct ordered_events *oe = &session->ordered_events; + struct perf_tool *tool = session->tool; + int fd = perf_data__fd(session->data); + u64 head, page_offset, file_offset, file_pos, size; + int err, mmap_prot, mmap_flags, map_idx = 0; + size_t mmap_size; + char *buf, *mmaps[NUM_MMAPS]; + union perf_event *event; + struct ui_progress prog; + s64 skip; + + perf_tool__fill_defaults(tool); + + page_offset = page_size * (data_offset / page_size); + file_offset = page_offset; + head = data_offset - page_offset; + + if (data_size == 0) + goto out; + + if (data_offset + data_size < file_size) + file_size = data_offset + data_size; + + ui_progress__init_size(&prog, file_size, "Processing events..."); + + mmap_size = MMAP_SIZE; + if (mmap_size > file_size) { + mmap_size = file_size; + session->one_mmap = true; + } + + memset(mmaps, 0, sizeof(mmaps)); + + mmap_prot = PROT_READ; + mmap_flags = MAP_SHARED; + + if (session->header.needs_swap) { + mmap_prot |= PROT_WRITE; + mmap_flags = MAP_PRIVATE; + } +remap: + buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd, + file_offset); + if (buf == MAP_FAILED) { + pr_err("failed to mmap file\n"); + err = -errno; + goto out_err; + } + mmaps[map_idx] = buf; + map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); + file_pos = file_offset + head; + if (session->one_mmap) { + session->one_mmap_addr = buf; + session->one_mmap_offset = file_offset; + } + +more: + event = fetch_mmaped_event(session, head, mmap_size, buf); + if (!event) { + if (mmaps[map_idx]) { + munmap(mmaps[map_idx], mmap_size); + mmaps[map_idx] = NULL; + } + + page_offset = page_size * (head / page_size); + file_offset += page_offset; + head -= page_offset; + goto remap; + } + + size = event->header.size; + + if (size < sizeof(struct perf_event_header) || + (skip = perf_session__process_event(session, event, file_pos)) < 0) { + pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", + file_offset + head, event->header.size, + event->header.type); + err = -EINVAL; + goto out_err; + } + + if (skip) + size += skip; + + head += size; + file_pos += size; + + ui_progress__update(&prog, size); + + if (session_done()) + goto out; + + if (file_pos < file_size) + goto more; + +out: + /* do the final flush for ordered samples */ + err = ordered_events__flush(oe, OE_FLUSH__FINAL); + if (err) + goto out_err; + err = auxtrace__flush_events(session, tool); + if (err) + goto out_err; + err = perf_session__flush_thread_stacks(session); +out_err: + ui_progress__finish(); + if (!tool->no_warn) + perf_session__warn_about_errors(session); + /* + * We may switching perf.data output, make ordered_events + * reusable. + */ + ordered_events__reinit(&session->ordered_events); + auxtrace__free_events(session); + session->one_mmap = false; + return err; +} + +int perf_session__process_events(struct perf_session *session) +{ + u64 size = perf_data__size(session->data); + int err; + + if (perf_session__register_idle_thread(session) < 0) + return -ENOMEM; + + if (!perf_data__is_pipe(session->data)) + err = __perf_session__process_events(session, + session->header.data_offset, + session->header.data_size, size); + else + err = __perf_session__process_pipe_events(session); + + return err; +} + +bool perf_session__has_traces(struct perf_session *session, const char *msg) +{ + struct perf_evsel *evsel; + + evlist__for_each_entry(session->evlist, evsel) { + if (evsel->attr.type == PERF_TYPE_TRACEPOINT) + return true; + } + + pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); + return false; +} + +int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr) +{ + char *bracket; + struct ref_reloc_sym *ref; + struct kmap *kmap; + + ref = zalloc(sizeof(struct ref_reloc_sym)); + if (ref == NULL) + return -ENOMEM; + + ref->name = strdup(symbol_name); + if (ref->name == NULL) { + free(ref); + return -ENOMEM; + } + + bracket = strchr(ref->name, ']'); + if (bracket) + *bracket = '\0'; + + ref->addr = addr; + + kmap = map__kmap(map); + if (kmap) + kmap->ref_reloc_sym = ref; + + return 0; +} + +size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) +{ + return machines__fprintf_dsos(&session->machines, fp); +} + +size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, + bool (skip)(struct dso *dso, int parm), int parm) +{ + return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); +} + +size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) +{ + size_t ret; + const char *msg = ""; + + if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) + msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; + + ret = fprintf(fp, "\nAggregated stats:%s\n", msg); + + ret += events_stats__fprintf(&session->evlist->stats, fp); + return ret; +} + +size_t perf_session__fprintf(struct perf_session *session, FILE *fp) +{ + /* + * FIXME: Here we have to actually print all the machines in this + * session, not just the host... + */ + return machine__fprintf(&session->machines.host, fp); +} + +struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, + unsigned int type) +{ + struct perf_evsel *pos; + + evlist__for_each_entry(session->evlist, pos) { + if (pos->attr.type == type) + return pos; + } + return NULL; +} + +int perf_session__cpu_bitmap(struct perf_session *session, + const char *cpu_list, unsigned long *cpu_bitmap) +{ + int i, err = -1; + struct cpu_map *map; + + for (i = 0; i < PERF_TYPE_MAX; ++i) { + struct perf_evsel *evsel; + + evsel = perf_session__find_first_evtype(session, i); + if (!evsel) + continue; + + if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { + pr_err("File does not contain CPU events. " + "Remove -C option to proceed.\n"); + return -1; + } + } + + map = cpu_map__new(cpu_list); + if (map == NULL) { + pr_err("Invalid cpu_list\n"); + return -1; + } + + for (i = 0; i < map->nr; i++) { + int cpu = map->map[i]; + + if (cpu >= MAX_NR_CPUS) { + pr_err("Requested CPU %d too large. " + "Consider raising MAX_NR_CPUS\n", cpu); + goto out_delete_map; + } + + set_bit(cpu, cpu_bitmap); + } + + err = 0; + +out_delete_map: + cpu_map__put(map); + return err; +} + +void perf_session__fprintf_info(struct perf_session *session, FILE *fp, + bool full) +{ + if (session == NULL || fp == NULL) + return; + + fprintf(fp, "# ========\n"); + perf_header__fprintf_info(session, fp, full); + fprintf(fp, "# ========\n#\n"); +} + + +int __perf_session__set_tracepoints_handlers(struct perf_session *session, + const struct perf_evsel_str_handler *assocs, + size_t nr_assocs) +{ + struct perf_evsel *evsel; + size_t i; + int err; + + for (i = 0; i < nr_assocs; i++) { + /* + * Adding a handler for an event not in the session, + * just ignore it. + */ + evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); + if (evsel == NULL) + continue; + + err = -EEXIST; + if (evsel->handler != NULL) + goto out; + evsel->handler = assocs[i].handler; + } + + err = 0; +out: + return err; +} + +int perf_event__process_id_index(struct perf_tool *tool __maybe_unused, + union perf_event *event, + struct perf_session *session) +{ + struct perf_evlist *evlist = session->evlist; + struct id_index_event *ie = &event->id_index; + size_t i, nr, max_nr; + + max_nr = (ie->header.size - sizeof(struct id_index_event)) / + sizeof(struct id_index_entry); + nr = ie->nr; + if (nr > max_nr) + return -EINVAL; + + if (dump_trace) + fprintf(stdout, " nr: %zu\n", nr); + + for (i = 0; i < nr; i++) { + struct id_index_entry *e = &ie->entries[i]; + struct perf_sample_id *sid; + + if (dump_trace) { + fprintf(stdout, " ... id: %"PRIu64, e->id); + fprintf(stdout, " idx: %"PRIu64, e->idx); + fprintf(stdout, " cpu: %"PRId64, e->cpu); + fprintf(stdout, " tid: %"PRId64"\n", e->tid); + } + + sid = perf_evlist__id2sid(evlist, e->id); + if (!sid) + return -ENOENT; + sid->idx = e->idx; + sid->cpu = e->cpu; + sid->tid = e->tid; + } + return 0; +} + +int perf_event__synthesize_id_index(struct perf_tool *tool, + perf_event__handler_t process, + struct perf_evlist *evlist, + struct machine *machine) +{ + union perf_event *ev; + struct perf_evsel *evsel; + size_t nr = 0, i = 0, sz, max_nr, n; + int err; + + pr_debug2("Synthesizing id index\n"); + + max_nr = (UINT16_MAX - sizeof(struct id_index_event)) / + sizeof(struct id_index_entry); + + evlist__for_each_entry(evlist, evsel) + nr += evsel->ids; + + n = nr > max_nr ? max_nr : nr; + sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry); + ev = zalloc(sz); + if (!ev) + return -ENOMEM; + + ev->id_index.header.type = PERF_RECORD_ID_INDEX; + ev->id_index.header.size = sz; + ev->id_index.nr = n; + + evlist__for_each_entry(evlist, evsel) { + u32 j; + + for (j = 0; j < evsel->ids; j++) { + struct id_index_entry *e; + struct perf_sample_id *sid; + + if (i >= n) { + err = process(tool, ev, NULL, machine); + if (err) + goto out_err; + nr -= n; + i = 0; + } + + e = &ev->id_index.entries[i++]; + + e->id = evsel->id[j]; + + sid = perf_evlist__id2sid(evlist, e->id); + if (!sid) { + free(ev); + return -ENOENT; + } + + e->idx = sid->idx; + e->cpu = sid->cpu; + e->tid = sid->tid; + } + } + + sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry); + ev->id_index.header.size = sz; + ev->id_index.nr = nr; + + err = process(tool, ev, NULL, machine); +out_err: + free(ev); + + return err; +} |