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// SPDX-License-Identifier: GPL-2.0
#include "data.h"
#include "debug.h"
#include "header.h"
#include "session.h"
#include "stat.h"
#include "tool.h"
#include "tsc.h"
#include <sys/mman.h>
#include <unistd.h>
#ifdef HAVE_ZSTD_SUPPORT
static int perf_session__process_compressed_event(struct perf_session *session,
union perf_event *event, u64 file_offset,
const char *file_path)
{
void *src;
size_t decomp_size, src_size;
u64 decomp_last_rem = 0;
size_t mmap_len, decomp_len = session->header.env.comp_mmap_len;
struct decomp *decomp, *decomp_last = session->active_decomp->decomp_last;
if (decomp_last) {
decomp_last_rem = decomp_last->size - decomp_last->head;
decomp_len += decomp_last_rem;
}
mmap_len = sizeof(struct decomp) + decomp_len;
decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE,
MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
if (decomp == MAP_FAILED) {
pr_err("Couldn't allocate memory for decompression\n");
return -1;
}
decomp->file_pos = file_offset;
decomp->file_path = file_path;
decomp->mmap_len = mmap_len;
decomp->head = 0;
if (decomp_last_rem) {
memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem);
decomp->size = decomp_last_rem;
}
src = (void *)event + sizeof(struct perf_record_compressed);
src_size = event->pack.header.size - sizeof(struct perf_record_compressed);
decomp_size = zstd_decompress_stream(session->active_decomp->zstd_decomp, src, src_size,
&(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem);
if (!decomp_size) {
munmap(decomp, mmap_len);
pr_err("Couldn't decompress data\n");
return -1;
}
decomp->size += decomp_size;
if (session->active_decomp->decomp == NULL)
session->active_decomp->decomp = decomp;
else
session->active_decomp->decomp_last->next = decomp;
session->active_decomp->decomp_last = decomp;
pr_debug("decomp (B): %zd to %zd\n", src_size, decomp_size);
return 0;
}
#endif
static int process_event_synth_tracing_data_stub(struct perf_session *session
__maybe_unused,
union perf_event *event
__maybe_unused)
{
dump_printf(": unhandled!\n");
return 0;
}
static int process_event_synth_attr_stub(const struct perf_tool *tool __maybe_unused,
union perf_event *event __maybe_unused,
struct evlist **pevlist
__maybe_unused)
{
dump_printf(": unhandled!\n");
return 0;
}
static int process_event_synth_event_update_stub(const struct perf_tool *tool __maybe_unused,
union perf_event *event __maybe_unused,
struct evlist **pevlist
__maybe_unused)
{
if (dump_trace)
perf_event__fprintf_event_update(event, stdout);
dump_printf(": unhandled!\n");
return 0;
}
int process_event_sample_stub(const struct perf_tool *tool __maybe_unused,
union perf_event *event __maybe_unused,
struct perf_sample *sample __maybe_unused,
struct evsel *evsel __maybe_unused,
struct machine *machine __maybe_unused)
{
dump_printf(": unhandled!\n");
return 0;
}
static int process_event_stub(const 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(const 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 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_session *session __maybe_unused,
union perf_event *event)
{
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_session *session __maybe_unused,
union perf_event *event __maybe_unused)
{
dump_printf(": unhandled!\n");
return 0;
}
static
int process_event_thread_map_stub(struct perf_session *session __maybe_unused,
union perf_event *event __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_session *session __maybe_unused,
union perf_event *event __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_session *session __maybe_unused,
union perf_event *event __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_session *perf_session __maybe_unused,
union perf_event *event)
{
if (dump_trace)
perf_event__fprintf_stat(event, stdout);
dump_printf(": unhandled!\n");
return 0;
}
static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused,
union perf_event *event)
{
if (dump_trace)
perf_event__fprintf_stat_round(event, stdout);
dump_printf(": unhandled!\n");
return 0;
}
static int process_event_time_conv_stub(struct perf_session *perf_session __maybe_unused,
union perf_event *event)
{
if (dump_trace)
perf_event__fprintf_time_conv(event, stdout);
dump_printf(": unhandled!\n");
return 0;
}
static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused,
union perf_event *event __maybe_unused,
u64 file_offset __maybe_unused,
const char *file_path __maybe_unused)
{
dump_printf(": unhandled!\n");
return 0;
}
void perf_tool__init(struct perf_tool *tool, bool ordered_events)
{
tool->ordered_events = ordered_events;
tool->ordering_requires_timestamps = false;
tool->namespace_events = false;
tool->cgroup_events = false;
tool->no_warn = false;
tool->show_feat_hdr = SHOW_FEAT_NO_HEADER;
tool->sample = process_event_sample_stub;
tool->mmap = process_event_stub;
tool->mmap2 = process_event_stub;
tool->comm = process_event_stub;
tool->namespaces = process_event_stub;
tool->cgroup = process_event_stub;
tool->fork = process_event_stub;
tool->exit = process_event_stub;
tool->lost = perf_event__process_lost;
tool->lost_samples = perf_event__process_lost_samples;
tool->aux = perf_event__process_aux;
tool->itrace_start = perf_event__process_itrace_start;
tool->context_switch = perf_event__process_switch;
tool->ksymbol = perf_event__process_ksymbol;
tool->bpf = perf_event__process_bpf;
tool->text_poke = perf_event__process_text_poke;
tool->aux_output_hw_id = perf_event__process_aux_output_hw_id;
tool->read = process_event_sample_stub;
tool->throttle = process_event_stub;
tool->unthrottle = process_event_stub;
tool->attr = process_event_synth_attr_stub;
tool->event_update = process_event_synth_event_update_stub;
tool->tracing_data = process_event_synth_tracing_data_stub;
tool->build_id = process_event_op2_stub;
if (ordered_events)
tool->finished_round = perf_event__process_finished_round;
else
tool->finished_round = process_finished_round_stub;
tool->id_index = process_event_op2_stub;
tool->auxtrace_info = process_event_op2_stub;
tool->auxtrace = process_event_auxtrace_stub;
tool->auxtrace_error = process_event_op2_stub;
tool->thread_map = process_event_thread_map_stub;
tool->cpu_map = process_event_cpu_map_stub;
tool->stat_config = process_event_stat_config_stub;
tool->stat = process_stat_stub;
tool->stat_round = process_stat_round_stub;
tool->time_conv = process_event_time_conv_stub;
tool->feature = process_event_op2_stub;
#ifdef HAVE_ZSTD_SUPPORT
tool->compressed = perf_session__process_compressed_event;
#else
tool->compressed = perf_session__process_compressed_event_stub;
#endif
tool->finished_init = process_event_op2_stub;
}
bool perf_tool__compressed_is_stub(const struct perf_tool *tool)
{
return tool->compressed == perf_session__process_compressed_event_stub;
}
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