forked from luck/tmp_suning_uos_patched
a1645ce12a
Here is the patch of userspace perf tool. Signed-off-by: Zhang Yanmin <yanmin_zhang@linux.intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
696 lines
16 KiB
C
696 lines
16 KiB
C
#define _FILE_OFFSET_BITS 64
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#include <linux/kernel.h>
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#include <byteswap.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include "session.h"
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#include "sort.h"
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#include "util.h"
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static int perf_session__open(struct perf_session *self, bool force)
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{
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struct stat input_stat;
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if (!strcmp(self->filename, "-")) {
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self->fd_pipe = true;
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self->fd = STDIN_FILENO;
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if (perf_header__read(self, self->fd) < 0)
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pr_err("incompatible file format");
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return 0;
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}
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self->fd = open(self->filename, O_RDONLY);
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if (self->fd < 0) {
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pr_err("failed to open file: %s", self->filename);
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if (!strcmp(self->filename, "perf.data"))
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pr_err(" (try 'perf record' first)");
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pr_err("\n");
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return -errno;
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}
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if (fstat(self->fd, &input_stat) < 0)
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goto out_close;
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if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
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pr_err("file %s not owned by current user or root\n",
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self->filename);
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goto out_close;
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}
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if (!input_stat.st_size) {
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pr_info("zero-sized file (%s), nothing to do!\n",
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self->filename);
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goto out_close;
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}
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if (perf_header__read(self, self->fd) < 0) {
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pr_err("incompatible file format");
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goto out_close;
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}
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self->size = input_stat.st_size;
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return 0;
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out_close:
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close(self->fd);
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self->fd = -1;
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return -1;
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}
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void perf_session__update_sample_type(struct perf_session *self)
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{
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self->sample_type = perf_header__sample_type(&self->header);
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}
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int perf_session__create_kernel_maps(struct perf_session *self)
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{
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int ret;
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struct rb_root *root = &self->kerninfo_root;
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ret = map_groups__create_kernel_maps(root, HOST_KERNEL_ID);
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if (ret >= 0)
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ret = map_groups__create_guest_kernel_maps(root);
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return ret;
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}
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struct perf_session *perf_session__new(const char *filename, int mode, bool force)
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{
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size_t len = filename ? strlen(filename) + 1 : 0;
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struct perf_session *self = zalloc(sizeof(*self) + len);
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if (self == NULL)
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goto out;
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if (perf_header__init(&self->header) < 0)
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goto out_free;
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memcpy(self->filename, filename, len);
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self->threads = RB_ROOT;
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self->stats_by_id = RB_ROOT;
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self->last_match = NULL;
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self->mmap_window = 32;
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self->cwd = NULL;
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self->cwdlen = 0;
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self->unknown_events = 0;
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self->kerninfo_root = RB_ROOT;
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if (mode == O_RDONLY) {
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if (perf_session__open(self, force) < 0)
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goto out_delete;
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} else if (mode == O_WRONLY) {
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/*
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* In O_RDONLY mode this will be performed when reading the
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* kernel MMAP event, in event__process_mmap().
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*/
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if (perf_session__create_kernel_maps(self) < 0)
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goto out_delete;
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}
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perf_session__update_sample_type(self);
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out:
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return self;
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out_free:
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free(self);
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return NULL;
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out_delete:
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perf_session__delete(self);
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return NULL;
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}
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void perf_session__delete(struct perf_session *self)
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{
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perf_header__exit(&self->header);
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close(self->fd);
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free(self->cwd);
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free(self);
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}
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static bool symbol__match_parent_regex(struct symbol *sym)
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{
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if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
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return 1;
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return 0;
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}
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struct map_symbol *perf_session__resolve_callchain(struct perf_session *self,
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struct thread *thread,
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struct ip_callchain *chain,
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struct symbol **parent)
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{
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u8 cpumode = PERF_RECORD_MISC_USER;
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unsigned int i;
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struct map_symbol *syms = calloc(chain->nr, sizeof(*syms));
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if (!syms)
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return NULL;
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for (i = 0; i < chain->nr; i++) {
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u64 ip = chain->ips[i];
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struct addr_location al;
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if (ip >= PERF_CONTEXT_MAX) {
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switch (ip) {
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case PERF_CONTEXT_HV:
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cpumode = PERF_RECORD_MISC_HYPERVISOR; break;
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case PERF_CONTEXT_KERNEL:
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cpumode = PERF_RECORD_MISC_KERNEL; break;
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case PERF_CONTEXT_USER:
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cpumode = PERF_RECORD_MISC_USER; break;
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default:
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break;
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}
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continue;
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}
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al.filtered = false;
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thread__find_addr_location(thread, self, cpumode,
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MAP__FUNCTION, thread->pid, ip, &al, NULL);
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if (al.sym != NULL) {
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if (sort__has_parent && !*parent &&
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symbol__match_parent_regex(al.sym))
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*parent = al.sym;
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if (!symbol_conf.use_callchain)
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break;
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syms[i].map = al.map;
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syms[i].sym = al.sym;
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}
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}
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return syms;
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}
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static int process_event_stub(event_t *event __used,
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struct perf_session *session __used)
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{
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dump_printf(": unhandled!\n");
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return 0;
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}
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static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
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{
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if (handler->sample == NULL)
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handler->sample = process_event_stub;
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if (handler->mmap == NULL)
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handler->mmap = process_event_stub;
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if (handler->comm == NULL)
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handler->comm = process_event_stub;
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if (handler->fork == NULL)
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handler->fork = process_event_stub;
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if (handler->exit == NULL)
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handler->exit = process_event_stub;
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if (handler->lost == NULL)
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handler->lost = process_event_stub;
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if (handler->read == NULL)
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handler->read = process_event_stub;
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if (handler->throttle == NULL)
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handler->throttle = process_event_stub;
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if (handler->unthrottle == NULL)
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handler->unthrottle = process_event_stub;
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if (handler->attr == NULL)
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handler->attr = process_event_stub;
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if (handler->event_type == NULL)
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handler->event_type = process_event_stub;
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if (handler->tracing_data == NULL)
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handler->tracing_data = process_event_stub;
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if (handler->build_id == NULL)
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handler->build_id = process_event_stub;
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}
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static const char *event__name[] = {
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[0] = "TOTAL",
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[PERF_RECORD_MMAP] = "MMAP",
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[PERF_RECORD_LOST] = "LOST",
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[PERF_RECORD_COMM] = "COMM",
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[PERF_RECORD_EXIT] = "EXIT",
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[PERF_RECORD_THROTTLE] = "THROTTLE",
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[PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
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[PERF_RECORD_FORK] = "FORK",
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[PERF_RECORD_READ] = "READ",
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[PERF_RECORD_SAMPLE] = "SAMPLE",
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[PERF_RECORD_HEADER_ATTR] = "ATTR",
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[PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
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[PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
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[PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
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};
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unsigned long event__total[PERF_RECORD_HEADER_MAX];
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void event__print_totals(void)
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{
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int i;
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for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) {
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if (!event__name[i])
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continue;
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pr_info("%10s events: %10ld\n",
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event__name[i], event__total[i]);
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}
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}
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void mem_bswap_64(void *src, int byte_size)
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{
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u64 *m = src;
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while (byte_size > 0) {
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*m = bswap_64(*m);
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byte_size -= sizeof(u64);
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++m;
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}
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}
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static void event__all64_swap(event_t *self)
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{
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struct perf_event_header *hdr = &self->header;
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mem_bswap_64(hdr + 1, self->header.size - sizeof(*hdr));
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}
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static void event__comm_swap(event_t *self)
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{
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self->comm.pid = bswap_32(self->comm.pid);
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self->comm.tid = bswap_32(self->comm.tid);
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}
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static void event__mmap_swap(event_t *self)
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{
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self->mmap.pid = bswap_32(self->mmap.pid);
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self->mmap.tid = bswap_32(self->mmap.tid);
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self->mmap.start = bswap_64(self->mmap.start);
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self->mmap.len = bswap_64(self->mmap.len);
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self->mmap.pgoff = bswap_64(self->mmap.pgoff);
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}
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static void event__task_swap(event_t *self)
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{
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self->fork.pid = bswap_32(self->fork.pid);
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self->fork.tid = bswap_32(self->fork.tid);
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self->fork.ppid = bswap_32(self->fork.ppid);
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self->fork.ptid = bswap_32(self->fork.ptid);
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self->fork.time = bswap_64(self->fork.time);
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}
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static void event__read_swap(event_t *self)
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{
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self->read.pid = bswap_32(self->read.pid);
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self->read.tid = bswap_32(self->read.tid);
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self->read.value = bswap_64(self->read.value);
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self->read.time_enabled = bswap_64(self->read.time_enabled);
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self->read.time_running = bswap_64(self->read.time_running);
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self->read.id = bswap_64(self->read.id);
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}
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static void event__attr_swap(event_t *self)
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{
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size_t size;
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self->attr.attr.type = bswap_32(self->attr.attr.type);
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self->attr.attr.size = bswap_32(self->attr.attr.size);
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self->attr.attr.config = bswap_64(self->attr.attr.config);
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self->attr.attr.sample_period = bswap_64(self->attr.attr.sample_period);
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self->attr.attr.sample_type = bswap_64(self->attr.attr.sample_type);
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self->attr.attr.read_format = bswap_64(self->attr.attr.read_format);
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self->attr.attr.wakeup_events = bswap_32(self->attr.attr.wakeup_events);
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self->attr.attr.bp_type = bswap_32(self->attr.attr.bp_type);
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self->attr.attr.bp_addr = bswap_64(self->attr.attr.bp_addr);
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self->attr.attr.bp_len = bswap_64(self->attr.attr.bp_len);
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size = self->header.size;
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size -= (void *)&self->attr.id - (void *)self;
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mem_bswap_64(self->attr.id, size);
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}
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static void event__event_type_swap(event_t *self)
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{
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self->event_type.event_type.event_id =
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bswap_64(self->event_type.event_type.event_id);
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}
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static void event__tracing_data_swap(event_t *self)
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{
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self->tracing_data.size = bswap_32(self->tracing_data.size);
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}
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typedef void (*event__swap_op)(event_t *self);
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static event__swap_op event__swap_ops[] = {
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[PERF_RECORD_MMAP] = event__mmap_swap,
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[PERF_RECORD_COMM] = event__comm_swap,
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[PERF_RECORD_FORK] = event__task_swap,
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[PERF_RECORD_EXIT] = event__task_swap,
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[PERF_RECORD_LOST] = event__all64_swap,
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[PERF_RECORD_READ] = event__read_swap,
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[PERF_RECORD_SAMPLE] = event__all64_swap,
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[PERF_RECORD_HEADER_ATTR] = event__attr_swap,
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[PERF_RECORD_HEADER_EVENT_TYPE] = event__event_type_swap,
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[PERF_RECORD_HEADER_TRACING_DATA] = event__tracing_data_swap,
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[PERF_RECORD_HEADER_BUILD_ID] = NULL,
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[PERF_RECORD_HEADER_MAX] = NULL,
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};
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static int perf_session__process_event(struct perf_session *self,
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event_t *event,
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struct perf_event_ops *ops,
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u64 offset, u64 head)
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{
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trace_event(event);
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if (event->header.type < PERF_RECORD_HEADER_MAX) {
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dump_printf("%#Lx [%#x]: PERF_RECORD_%s",
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offset + head, event->header.size,
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event__name[event->header.type]);
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++event__total[0];
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++event__total[event->header.type];
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}
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if (self->header.needs_swap && event__swap_ops[event->header.type])
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event__swap_ops[event->header.type](event);
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switch (event->header.type) {
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case PERF_RECORD_SAMPLE:
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return ops->sample(event, self);
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case PERF_RECORD_MMAP:
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return ops->mmap(event, self);
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case PERF_RECORD_COMM:
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return ops->comm(event, self);
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case PERF_RECORD_FORK:
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return ops->fork(event, self);
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case PERF_RECORD_EXIT:
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return ops->exit(event, self);
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case PERF_RECORD_LOST:
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return ops->lost(event, self);
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case PERF_RECORD_READ:
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return ops->read(event, self);
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case PERF_RECORD_THROTTLE:
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return ops->throttle(event, self);
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case PERF_RECORD_UNTHROTTLE:
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return ops->unthrottle(event, self);
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case PERF_RECORD_HEADER_ATTR:
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return ops->attr(event, self);
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case PERF_RECORD_HEADER_EVENT_TYPE:
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return ops->event_type(event, self);
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case PERF_RECORD_HEADER_TRACING_DATA:
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/* setup for reading amidst mmap */
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lseek(self->fd, offset + head, SEEK_SET);
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return ops->tracing_data(event, self);
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case PERF_RECORD_HEADER_BUILD_ID:
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return ops->build_id(event, self);
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default:
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self->unknown_events++;
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return -1;
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}
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}
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void perf_event_header__bswap(struct perf_event_header *self)
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{
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self->type = bswap_32(self->type);
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self->misc = bswap_16(self->misc);
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self->size = bswap_16(self->size);
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}
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static struct thread *perf_session__register_idle_thread(struct perf_session *self)
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{
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struct thread *thread = perf_session__findnew(self, 0);
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if (thread == NULL || thread__set_comm(thread, "swapper")) {
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pr_err("problem inserting idle task.\n");
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thread = NULL;
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}
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return thread;
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}
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int do_read(int fd, void *buf, size_t size)
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{
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void *buf_start = buf;
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while (size) {
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int ret = read(fd, buf, size);
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if (ret <= 0)
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return ret;
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size -= ret;
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buf += ret;
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}
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return buf - buf_start;
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}
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#define session_done() (*(volatile int *)(&session_done))
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volatile int session_done;
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static int __perf_session__process_pipe_events(struct perf_session *self,
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struct perf_event_ops *ops)
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{
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event_t event;
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uint32_t size;
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int skip = 0;
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u64 head;
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int err;
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void *p;
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perf_event_ops__fill_defaults(ops);
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head = 0;
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more:
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err = do_read(self->fd, &event, sizeof(struct perf_event_header));
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if (err <= 0) {
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if (err == 0)
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goto done;
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pr_err("failed to read event header\n");
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goto out_err;
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}
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if (self->header.needs_swap)
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perf_event_header__bswap(&event.header);
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size = event.header.size;
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if (size == 0)
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size = 8;
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p = &event;
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p += sizeof(struct perf_event_header);
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err = do_read(self->fd, p, size - sizeof(struct perf_event_header));
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if (err <= 0) {
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if (err == 0) {
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pr_err("unexpected end of event stream\n");
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goto done;
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}
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pr_err("failed to read event data\n");
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goto out_err;
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}
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if (size == 0 ||
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(skip = perf_session__process_event(self, &event, ops,
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0, head)) < 0) {
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dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n",
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head, event.header.size, event.header.type);
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/*
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* assume we lost track of the stream, check alignment, and
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* increment a single u64 in the hope to catch on again 'soon'.
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*/
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if (unlikely(head & 7))
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head &= ~7ULL;
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size = 8;
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}
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head += size;
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dump_printf("\n%#Lx [%#x]: event: %d\n",
|
|
head, event.header.size, event.header.type);
|
|
|
|
if (skip > 0)
|
|
head += skip;
|
|
|
|
if (!session_done())
|
|
goto more;
|
|
done:
|
|
err = 0;
|
|
out_err:
|
|
return err;
|
|
}
|
|
|
|
int __perf_session__process_events(struct perf_session *self,
|
|
u64 data_offset, u64 data_size,
|
|
u64 file_size, struct perf_event_ops *ops)
|
|
{
|
|
int err, mmap_prot, mmap_flags;
|
|
u64 head, shift;
|
|
u64 offset = 0;
|
|
size_t page_size;
|
|
event_t *event;
|
|
uint32_t size;
|
|
char *buf;
|
|
struct ui_progress *progress = ui_progress__new("Processing events...",
|
|
self->size);
|
|
if (progress == NULL)
|
|
return -1;
|
|
|
|
perf_event_ops__fill_defaults(ops);
|
|
|
|
page_size = sysconf(_SC_PAGESIZE);
|
|
|
|
head = data_offset;
|
|
shift = page_size * (head / page_size);
|
|
offset += shift;
|
|
head -= shift;
|
|
|
|
mmap_prot = PROT_READ;
|
|
mmap_flags = MAP_SHARED;
|
|
|
|
if (self->header.needs_swap) {
|
|
mmap_prot |= PROT_WRITE;
|
|
mmap_flags = MAP_PRIVATE;
|
|
}
|
|
remap:
|
|
buf = mmap(NULL, page_size * self->mmap_window, mmap_prot,
|
|
mmap_flags, self->fd, offset);
|
|
if (buf == MAP_FAILED) {
|
|
pr_err("failed to mmap file\n");
|
|
err = -errno;
|
|
goto out_err;
|
|
}
|
|
|
|
more:
|
|
event = (event_t *)(buf + head);
|
|
ui_progress__update(progress, offset);
|
|
|
|
if (self->header.needs_swap)
|
|
perf_event_header__bswap(&event->header);
|
|
size = event->header.size;
|
|
if (size == 0)
|
|
size = 8;
|
|
|
|
if (head + event->header.size >= page_size * self->mmap_window) {
|
|
int munmap_ret;
|
|
|
|
shift = page_size * (head / page_size);
|
|
|
|
munmap_ret = munmap(buf, page_size * self->mmap_window);
|
|
assert(munmap_ret == 0);
|
|
|
|
offset += shift;
|
|
head -= shift;
|
|
goto remap;
|
|
}
|
|
|
|
size = event->header.size;
|
|
|
|
dump_printf("\n%#Lx [%#x]: event: %d\n",
|
|
offset + head, event->header.size, event->header.type);
|
|
|
|
if (size == 0 ||
|
|
perf_session__process_event(self, event, ops, offset, head) < 0) {
|
|
dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n",
|
|
offset + head, event->header.size,
|
|
event->header.type);
|
|
/*
|
|
* assume we lost track of the stream, check alignment, and
|
|
* increment a single u64 in the hope to catch on again 'soon'.
|
|
*/
|
|
if (unlikely(head & 7))
|
|
head &= ~7ULL;
|
|
|
|
size = 8;
|
|
}
|
|
|
|
head += size;
|
|
|
|
if (offset + head >= data_offset + data_size)
|
|
goto done;
|
|
|
|
if (offset + head < file_size)
|
|
goto more;
|
|
done:
|
|
err = 0;
|
|
out_err:
|
|
ui_progress__delete(progress);
|
|
return err;
|
|
}
|
|
|
|
int perf_session__process_events(struct perf_session *self,
|
|
struct perf_event_ops *ops)
|
|
{
|
|
int err;
|
|
|
|
if (perf_session__register_idle_thread(self) == NULL)
|
|
return -ENOMEM;
|
|
|
|
if (!symbol_conf.full_paths) {
|
|
char bf[PATH_MAX];
|
|
|
|
if (getcwd(bf, sizeof(bf)) == NULL) {
|
|
err = -errno;
|
|
out_getcwd_err:
|
|
pr_err("failed to get the current directory\n");
|
|
goto out_err;
|
|
}
|
|
self->cwd = strdup(bf);
|
|
if (self->cwd == NULL) {
|
|
err = -ENOMEM;
|
|
goto out_getcwd_err;
|
|
}
|
|
self->cwdlen = strlen(self->cwd);
|
|
}
|
|
|
|
if (!self->fd_pipe)
|
|
err = __perf_session__process_events(self,
|
|
self->header.data_offset,
|
|
self->header.data_size,
|
|
self->size, ops);
|
|
else
|
|
err = __perf_session__process_pipe_events(self, ops);
|
|
out_err:
|
|
return err;
|
|
}
|
|
|
|
bool perf_session__has_traces(struct perf_session *self, const char *msg)
|
|
{
|
|
if (!(self->sample_type & PERF_SAMPLE_RAW)) {
|
|
pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps,
|
|
const char *symbol_name,
|
|
u64 addr)
|
|
{
|
|
char *bracket;
|
|
enum map_type i;
|
|
struct ref_reloc_sym *ref;
|
|
|
|
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;
|
|
|
|
for (i = 0; i < MAP__NR_TYPES; ++i) {
|
|
struct kmap *kmap = map__kmap(maps[i]);
|
|
kmap->ref_reloc_sym = ref;
|
|
}
|
|
|
|
return 0;
|
|
}
|