![Arnaldo Carvalho de Melo](/assets/img/avatar_default.png)
And move the event_t methods to the perf_event__ too. No code changes, just namespace consistency. Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
483 lines
11 KiB
C
483 lines
11 KiB
C
/*
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* builtin-annotate.c
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*
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* Builtin annotate command: Analyze the perf.data input file,
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* look up and read DSOs and symbol information and display
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* a histogram of results, along various sorting keys.
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*/
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#include "builtin.h"
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#include "util/util.h"
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#include "util/color.h"
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#include <linux/list.h>
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#include "util/cache.h"
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#include <linux/rbtree.h>
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#include "util/symbol.h"
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#include "perf.h"
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#include "util/debug.h"
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#include "util/event.h"
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#include "util/parse-options.h"
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#include "util/parse-events.h"
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#include "util/thread.h"
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#include "util/sort.h"
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#include "util/hist.h"
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#include "util/session.h"
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static char const *input_name = "perf.data";
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static bool force, use_tui, use_stdio;
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static bool full_paths;
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static bool print_line;
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static const char *sym_hist_filter;
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static int hists__add_entry(struct hists *self, struct addr_location *al)
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{
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struct hist_entry *he;
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if (sym_hist_filter != NULL &&
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(al->sym == NULL || strcmp(sym_hist_filter, al->sym->name) != 0)) {
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/* We're only interested in a symbol named sym_hist_filter */
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if (al->sym != NULL) {
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rb_erase(&al->sym->rb_node,
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&al->map->dso->symbols[al->map->type]);
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symbol__delete(al->sym);
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}
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return 0;
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}
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he = __hists__add_entry(self, al, NULL, 1);
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if (he == NULL)
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return -ENOMEM;
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return hist_entry__inc_addr_samples(he, al->addr);
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}
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static int process_sample_event(union perf_event *event,
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struct perf_sample *sample,
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struct perf_session *session)
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{
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struct addr_location al;
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if (perf_event__preprocess_sample(event, session, &al, sample, NULL) < 0) {
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pr_warning("problem processing %d event, skipping it.\n",
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event->header.type);
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return -1;
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}
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if (!al.filtered && hists__add_entry(&session->hists, &al)) {
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pr_warning("problem incrementing symbol count, "
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"skipping event\n");
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return -1;
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}
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return 0;
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}
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static int objdump_line__print(struct objdump_line *self,
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struct list_head *head,
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struct hist_entry *he, u64 len)
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{
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struct symbol *sym = he->ms.sym;
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static const char *prev_line;
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static const char *prev_color;
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if (self->offset != -1) {
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const char *path = NULL;
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unsigned int hits = 0;
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double percent = 0.0;
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const char *color;
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struct sym_priv *priv = symbol__priv(sym);
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struct sym_ext *sym_ext = priv->ext;
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struct sym_hist *h = priv->hist;
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s64 offset = self->offset;
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struct objdump_line *next = objdump__get_next_ip_line(head, self);
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while (offset < (s64)len &&
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(next == NULL || offset < next->offset)) {
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if (sym_ext) {
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if (path == NULL)
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path = sym_ext[offset].path;
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percent += sym_ext[offset].percent;
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} else
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hits += h->ip[offset];
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++offset;
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}
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if (sym_ext == NULL && h->sum)
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percent = 100.0 * hits / h->sum;
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color = get_percent_color(percent);
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/*
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* Also color the filename and line if needed, with
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* the same color than the percentage. Don't print it
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* twice for close colored ip with the same filename:line
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*/
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if (path) {
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if (!prev_line || strcmp(prev_line, path)
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|| color != prev_color) {
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color_fprintf(stdout, color, " %s", path);
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prev_line = path;
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prev_color = color;
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}
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}
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color_fprintf(stdout, color, " %7.2f", percent);
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printf(" : ");
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color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", self->line);
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} else {
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if (!*self->line)
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printf(" :\n");
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else
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printf(" : %s\n", self->line);
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}
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return 0;
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}
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static struct rb_root root_sym_ext;
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static void insert_source_line(struct sym_ext *sym_ext)
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{
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struct sym_ext *iter;
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struct rb_node **p = &root_sym_ext.rb_node;
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struct rb_node *parent = NULL;
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while (*p != NULL) {
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parent = *p;
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iter = rb_entry(parent, struct sym_ext, node);
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if (sym_ext->percent > iter->percent)
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p = &(*p)->rb_left;
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else
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p = &(*p)->rb_right;
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}
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rb_link_node(&sym_ext->node, parent, p);
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rb_insert_color(&sym_ext->node, &root_sym_ext);
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}
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static void free_source_line(struct hist_entry *he, int len)
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{
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struct sym_priv *priv = symbol__priv(he->ms.sym);
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struct sym_ext *sym_ext = priv->ext;
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int i;
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if (!sym_ext)
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return;
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for (i = 0; i < len; i++)
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free(sym_ext[i].path);
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free(sym_ext);
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priv->ext = NULL;
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root_sym_ext = RB_ROOT;
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}
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/* Get the filename:line for the colored entries */
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static void
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get_source_line(struct hist_entry *he, int len, const char *filename)
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{
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struct symbol *sym = he->ms.sym;
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u64 start;
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int i;
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char cmd[PATH_MAX * 2];
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struct sym_ext *sym_ext;
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struct sym_priv *priv = symbol__priv(sym);
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struct sym_hist *h = priv->hist;
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if (!h->sum)
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return;
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sym_ext = priv->ext = calloc(len, sizeof(struct sym_ext));
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if (!priv->ext)
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return;
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start = he->ms.map->unmap_ip(he->ms.map, sym->start);
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for (i = 0; i < len; i++) {
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char *path = NULL;
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size_t line_len;
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u64 offset;
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FILE *fp;
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sym_ext[i].percent = 100.0 * h->ip[i] / h->sum;
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if (sym_ext[i].percent <= 0.5)
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continue;
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offset = start + i;
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sprintf(cmd, "addr2line -e %s %016" PRIx64, filename, offset);
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fp = popen(cmd, "r");
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if (!fp)
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continue;
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if (getline(&path, &line_len, fp) < 0 || !line_len)
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goto next;
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sym_ext[i].path = malloc(sizeof(char) * line_len + 1);
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if (!sym_ext[i].path)
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goto next;
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strcpy(sym_ext[i].path, path);
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insert_source_line(&sym_ext[i]);
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next:
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pclose(fp);
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}
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}
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static void print_summary(const char *filename)
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{
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struct sym_ext *sym_ext;
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struct rb_node *node;
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printf("\nSorted summary for file %s\n", filename);
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printf("----------------------------------------------\n\n");
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if (RB_EMPTY_ROOT(&root_sym_ext)) {
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printf(" Nothing higher than %1.1f%%\n", MIN_GREEN);
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return;
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}
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node = rb_first(&root_sym_ext);
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while (node) {
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double percent;
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const char *color;
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char *path;
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sym_ext = rb_entry(node, struct sym_ext, node);
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percent = sym_ext->percent;
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color = get_percent_color(percent);
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path = sym_ext->path;
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color_fprintf(stdout, color, " %7.2f %s", percent, path);
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node = rb_next(node);
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}
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}
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static void hist_entry__print_hits(struct hist_entry *self)
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{
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struct symbol *sym = self->ms.sym;
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struct sym_priv *priv = symbol__priv(sym);
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struct sym_hist *h = priv->hist;
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u64 len = sym->end - sym->start, offset;
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for (offset = 0; offset < len; ++offset)
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if (h->ip[offset] != 0)
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printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2,
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sym->start + offset, h->ip[offset]);
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printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum);
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}
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static int hist_entry__tty_annotate(struct hist_entry *he)
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{
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struct map *map = he->ms.map;
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struct dso *dso = map->dso;
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struct symbol *sym = he->ms.sym;
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const char *filename = dso->long_name, *d_filename;
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u64 len;
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LIST_HEAD(head);
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struct objdump_line *pos, *n;
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if (hist_entry__annotate(he, &head, 0) < 0)
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return -1;
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if (full_paths)
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d_filename = filename;
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else
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d_filename = basename(filename);
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len = sym->end - sym->start;
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if (print_line) {
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get_source_line(he, len, filename);
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print_summary(filename);
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}
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printf("\n\n------------------------------------------------\n");
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printf(" Percent | Source code & Disassembly of %s\n", d_filename);
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printf("------------------------------------------------\n");
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if (verbose)
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hist_entry__print_hits(he);
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list_for_each_entry_safe(pos, n, &head, node) {
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objdump_line__print(pos, &head, he, len);
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list_del(&pos->node);
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objdump_line__free(pos);
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}
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if (print_line)
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free_source_line(he, len);
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return 0;
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}
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static void hists__find_annotations(struct hists *self)
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{
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struct rb_node *nd = rb_first(&self->entries), *next;
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int key = KEY_RIGHT;
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while (nd) {
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struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
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struct sym_priv *priv;
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if (he->ms.sym == NULL || he->ms.map->dso->annotate_warned)
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goto find_next;
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priv = symbol__priv(he->ms.sym);
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if (priv->hist == NULL) {
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find_next:
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if (key == KEY_LEFT)
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nd = rb_prev(nd);
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else
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nd = rb_next(nd);
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continue;
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}
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if (use_browser > 0) {
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key = hist_entry__tui_annotate(he);
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switch (key) {
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case KEY_RIGHT:
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next = rb_next(nd);
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break;
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case KEY_LEFT:
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next = rb_prev(nd);
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break;
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default:
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return;
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}
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if (next != NULL)
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nd = next;
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} else {
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hist_entry__tty_annotate(he);
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nd = rb_next(nd);
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/*
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* Since we have a hist_entry per IP for the same
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* symbol, free he->ms.sym->hist to signal we already
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* processed this symbol.
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*/
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free(priv->hist);
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priv->hist = NULL;
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}
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}
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}
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static struct perf_event_ops event_ops = {
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.sample = process_sample_event,
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.mmap = perf_event__process_mmap,
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.comm = perf_event__process_comm,
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.fork = perf_event__process_task,
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.ordered_samples = true,
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.ordering_requires_timestamps = true,
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};
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static int __cmd_annotate(void)
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{
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int ret;
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struct perf_session *session;
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session = perf_session__new(input_name, O_RDONLY, force, false, &event_ops);
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if (session == NULL)
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return -ENOMEM;
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ret = perf_session__process_events(session, &event_ops);
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if (ret)
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goto out_delete;
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if (dump_trace) {
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perf_session__fprintf_nr_events(session, stdout);
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goto out_delete;
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}
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if (verbose > 3)
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perf_session__fprintf(session, stdout);
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if (verbose > 2)
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perf_session__fprintf_dsos(session, stdout);
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hists__collapse_resort(&session->hists);
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hists__output_resort(&session->hists);
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hists__find_annotations(&session->hists);
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out_delete:
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perf_session__delete(session);
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return ret;
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}
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static const char * const annotate_usage[] = {
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"perf annotate [<options>] <command>",
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NULL
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};
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static const struct option options[] = {
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OPT_STRING('i', "input", &input_name, "file",
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"input file name"),
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OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
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"only consider symbols in these dsos"),
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OPT_STRING('s', "symbol", &sym_hist_filter, "symbol",
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"symbol to annotate"),
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OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
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OPT_INCR('v', "verbose", &verbose,
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"be more verbose (show symbol address, etc)"),
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OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
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"dump raw trace in ASCII"),
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OPT_BOOLEAN(0, "tui", &use_tui, "Use the TUI interface"),
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OPT_BOOLEAN(0, "stdio", &use_stdio, "Use the stdio interface"),
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OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
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"file", "vmlinux pathname"),
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OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
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"load module symbols - WARNING: use only with -k and LIVE kernel"),
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OPT_BOOLEAN('l', "print-line", &print_line,
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"print matching source lines (may be slow)"),
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OPT_BOOLEAN('P', "full-paths", &full_paths,
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"Don't shorten the displayed pathnames"),
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OPT_END()
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};
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int cmd_annotate(int argc, const char **argv, const char *prefix __used)
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{
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argc = parse_options(argc, argv, options, annotate_usage, 0);
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if (use_stdio)
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use_browser = 0;
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else if (use_tui)
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use_browser = 1;
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setup_browser();
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symbol_conf.priv_size = sizeof(struct sym_priv);
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symbol_conf.try_vmlinux_path = true;
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if (symbol__init() < 0)
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return -1;
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setup_sorting(annotate_usage, options);
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if (argc) {
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/*
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* Special case: if there's an argument left then assume tha
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* it's a symbol filter:
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*/
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if (argc > 1)
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usage_with_options(annotate_usage, options);
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sym_hist_filter = argv[0];
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}
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if (field_sep && *field_sep == '.') {
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pr_err("'.' is the only non valid --field-separator argument\n");
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return -1;
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}
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return __cmd_annotate();
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}
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