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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-13 21:16:53 +07:00
fb7d0b3cef
GCC 4.6.0 in Fedora rawhide turned up some compile errors in tools/perf due to the -Werror=unused-but-set-variable flag. I've gone through and annotated some of the assignments that had side effects (ie: return value from a function) with the __used annotation, and in some cases, just removed unused code. In a few cases, we were assigning something useful, but not using it in later parts of the function. kyle@dreadnought:~/src% gcc --version gcc (GCC) 4.6.0 20110122 (Red Hat 4.6.0-0.3) Cc: Ingo Molnar <mingo@redhat.com> LKML-Reference: <20110124161304.GK27353@bombadil.infradead.org> Signed-off-by: Kyle McMartin <kyle@redhat.com> [ committer note: Fixed up the annotation fixes, as that code moved recently ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
548 lines
13 KiB
C
548 lines
13 KiB
C
/*
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* Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Parts came from builtin-annotate.c, see those files for further
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* copyright notes.
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include "util.h"
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#include "build-id.h"
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#include "color.h"
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#include "cache.h"
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#include "symbol.h"
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#include "debug.h"
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#include "annotate.h"
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int symbol__alloc_hist(struct symbol *sym, int nevents)
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{
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struct annotation *notes = symbol__annotation(sym);
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notes->sizeof_sym_hist = (sizeof(*notes->histograms) +
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(sym->end - sym->start) * sizeof(u64));
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notes->histograms = calloc(nevents, notes->sizeof_sym_hist);
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notes->nr_histograms = nevents;
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return notes->histograms == NULL ? -1 : 0;
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}
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void symbol__annotate_zero_histograms(struct symbol *sym)
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{
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struct annotation *notes = symbol__annotation(sym);
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if (notes->histograms != NULL)
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memset(notes->histograms, 0,
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notes->nr_histograms * notes->sizeof_sym_hist);
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}
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int symbol__inc_addr_samples(struct symbol *sym, struct map *map,
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int evidx, u64 addr)
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{
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unsigned offset;
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struct annotation *notes;
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struct sym_hist *h;
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notes = symbol__annotation(sym);
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if (notes->histograms == NULL)
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return -ENOMEM;
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pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr));
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if (addr >= sym->end)
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return 0;
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offset = addr - sym->start;
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h = annotation__histogram(notes, evidx);
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h->sum++;
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h->addr[offset]++;
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pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64
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", evidx=%d] => %" PRIu64 "\n", sym->start, sym->name,
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addr, addr - sym->start, evidx, h->addr[offset]);
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return 0;
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}
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static struct objdump_line *objdump_line__new(s64 offset, char *line, size_t privsize)
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{
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struct objdump_line *self = malloc(sizeof(*self) + privsize);
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if (self != NULL) {
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self->offset = offset;
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self->line = line;
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}
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return self;
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}
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void objdump_line__free(struct objdump_line *self)
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{
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free(self->line);
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free(self);
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}
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static void objdump__add_line(struct list_head *head, struct objdump_line *line)
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{
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list_add_tail(&line->node, head);
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}
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struct objdump_line *objdump__get_next_ip_line(struct list_head *head,
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struct objdump_line *pos)
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{
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list_for_each_entry_continue(pos, head, node)
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if (pos->offset >= 0)
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return pos;
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return NULL;
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}
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static int objdump_line__print(struct objdump_line *oline,
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struct list_head *head, struct symbol *sym,
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int evidx, u64 len, int min_pcnt,
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int printed, int max_lines)
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{
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static const char *prev_line;
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static const char *prev_color;
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if (oline->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 annotation *notes = symbol__annotation(sym);
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struct source_line *src_line = notes->src_line;
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struct sym_hist *h = annotation__histogram(notes, evidx);
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s64 offset = oline->offset;
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struct objdump_line *next = objdump__get_next_ip_line(head, oline);
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while (offset < (s64)len &&
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(next == NULL || offset < next->offset)) {
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if (src_line) {
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if (path == NULL)
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path = src_line[offset].path;
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percent += src_line[offset].percent;
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} else
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hits += h->addr[offset];
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++offset;
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}
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if (src_line == NULL && h->sum)
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percent = 100.0 * hits / h->sum;
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if (percent < min_pcnt)
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return -1;
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if (printed >= max_lines)
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return 1;
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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 addr 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", oline->line);
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} else if (printed >= max_lines)
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return 1;
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else {
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if (!*oline->line)
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printf(" :\n");
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else
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printf(" : %s\n", oline->line);
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}
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return 0;
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}
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static int symbol__parse_objdump_line(struct symbol *sym, struct map *map, FILE *file,
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struct list_head *head, size_t privsize)
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{
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struct objdump_line *objdump_line;
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char *line = NULL, *tmp, *tmp2, *c;
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size_t line_len;
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s64 line_ip, offset = -1;
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if (getline(&line, &line_len, file) < 0)
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return -1;
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if (!line)
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return -1;
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while (line_len != 0 && isspace(line[line_len - 1]))
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line[--line_len] = '\0';
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c = strchr(line, '\n');
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if (c)
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*c = 0;
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line_ip = -1;
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/*
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* Strip leading spaces:
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*/
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tmp = line;
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while (*tmp) {
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if (*tmp != ' ')
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break;
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tmp++;
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}
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if (*tmp) {
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/*
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* Parse hexa addresses followed by ':'
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*/
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line_ip = strtoull(tmp, &tmp2, 16);
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if (*tmp2 != ':' || tmp == tmp2 || tmp2[1] == '\0')
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line_ip = -1;
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}
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if (line_ip != -1) {
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u64 start = map__rip_2objdump(map, sym->start),
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end = map__rip_2objdump(map, sym->end);
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offset = line_ip - start;
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if (offset < 0 || (u64)line_ip > end)
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offset = -1;
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}
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objdump_line = objdump_line__new(offset, line, privsize);
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if (objdump_line == NULL) {
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free(line);
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return -1;
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}
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objdump__add_line(head, objdump_line);
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return 0;
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}
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int symbol__annotate(struct symbol *sym, struct map *map,
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struct list_head *head, size_t privsize)
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{
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struct dso *dso = map->dso;
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char *filename = dso__build_id_filename(dso, NULL, 0);
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bool free_filename = true;
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char command[PATH_MAX * 2];
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FILE *file;
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int err = 0;
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char symfs_filename[PATH_MAX];
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if (filename) {
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snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
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symbol_conf.symfs, filename);
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}
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if (filename == NULL) {
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if (dso->has_build_id) {
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pr_err("Can't annotate %s: not enough memory\n",
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sym->name);
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return -ENOMEM;
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}
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goto fallback;
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} else if (readlink(symfs_filename, command, sizeof(command)) < 0 ||
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strstr(command, "[kernel.kallsyms]") ||
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access(symfs_filename, R_OK)) {
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free(filename);
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fallback:
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/*
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* If we don't have build-ids or the build-id file isn't in the
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* cache, or is just a kallsyms file, well, lets hope that this
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* DSO is the same as when 'perf record' ran.
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*/
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filename = dso->long_name;
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snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
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symbol_conf.symfs, filename);
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free_filename = false;
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}
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if (dso->origin == DSO__ORIG_KERNEL) {
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if (dso->annotate_warned)
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goto out_free_filename;
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err = -ENOENT;
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dso->annotate_warned = 1;
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pr_err("Can't annotate %s: No vmlinux file was found in the "
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"path\n", sym->name);
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goto out_free_filename;
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}
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pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__,
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filename, sym->name, map->unmap_ip(map, sym->start),
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map->unmap_ip(map, sym->end));
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pr_debug("annotating [%p] %30s : [%p] %30s\n",
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dso, dso->long_name, sym, sym->name);
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snprintf(command, sizeof(command),
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"objdump --start-address=0x%016" PRIx64
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" --stop-address=0x%016" PRIx64 " -dS -C %s|grep -v %s|expand",
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map__rip_2objdump(map, sym->start),
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map__rip_2objdump(map, sym->end),
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symfs_filename, filename);
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pr_debug("Executing: %s\n", command);
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file = popen(command, "r");
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if (!file)
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goto out_free_filename;
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while (!feof(file))
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if (symbol__parse_objdump_line(sym, map, file, head, privsize) < 0)
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break;
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pclose(file);
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out_free_filename:
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if (free_filename)
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free(filename);
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return err;
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}
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static void insert_source_line(struct rb_root *root, struct source_line *src_line)
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{
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struct source_line *iter;
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struct rb_node **p = &root->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 source_line, node);
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if (src_line->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(&src_line->node, parent, p);
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rb_insert_color(&src_line->node, root);
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}
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static void symbol__free_source_line(struct symbol *sym, int len)
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{
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struct annotation *notes = symbol__annotation(sym);
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struct source_line *src_line = notes->src_line;
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int i;
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for (i = 0; i < len; i++)
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free(src_line[i].path);
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free(src_line);
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notes->src_line = NULL;
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}
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/* Get the filename:line for the colored entries */
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static int symbol__get_source_line(struct symbol *sym, struct map *map,
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int evidx, struct rb_root *root, int len,
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const char *filename)
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{
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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 source_line *src_line;
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struct annotation *notes = symbol__annotation(sym);
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struct sym_hist *h = annotation__histogram(notes, evidx);
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if (!h->sum)
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return 0;
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src_line = notes->src_line = calloc(len, sizeof(struct source_line));
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if (!notes->src_line)
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return -1;
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start = map->unmap_ip(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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src_line[i].percent = 100.0 * h->addr[i] / h->sum;
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if (src_line[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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src_line[i].path = malloc(sizeof(char) * line_len + 1);
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if (!src_line[i].path)
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goto next;
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strcpy(src_line[i].path, path);
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insert_source_line(root, &src_line[i]);
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next:
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pclose(fp);
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}
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return 0;
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}
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static void print_summary(struct rb_root *root, const char *filename)
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{
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struct source_line *src_line;
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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)) {
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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);
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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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src_line = rb_entry(node, struct source_line, node);
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percent = src_line->percent;
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color = get_percent_color(percent);
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path = src_line->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 symbol__annotate_hits(struct symbol *sym, int evidx)
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{
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struct annotation *notes = symbol__annotation(sym);
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struct sym_hist *h = annotation__histogram(notes, evidx);
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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->addr[offset] != 0)
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printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2,
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sym->start + offset, h->addr[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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int symbol__annotate_printf(struct symbol *sym, struct map *map,
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struct list_head *head, int evidx, bool full_paths,
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int min_pcnt, int max_lines)
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{
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struct dso *dso = map->dso;
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const char *filename = dso->long_name, *d_filename;
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struct objdump_line *pos;
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int printed = 2;
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int more = 0;
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u64 len;
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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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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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symbol__annotate_hits(sym, evidx);
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list_for_each_entry(pos, head, node) {
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switch (objdump_line__print(pos, head, sym, evidx, len, min_pcnt,
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printed, max_lines)) {
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case 0:
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++printed;
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break;
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case 1:
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/* filtered by max_lines */
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++more;
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break;
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case -1:
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default:
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/* filtered by min_pcnt */
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break;
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}
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}
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return more;
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}
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void symbol__annotate_zero_histogram(struct symbol *sym, int evidx)
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{
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struct annotation *notes = symbol__annotation(sym);
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struct sym_hist *h = annotation__histogram(notes, evidx);
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memset(h, 0, notes->sizeof_sym_hist);
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}
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void symbol__annotate_decay_histogram(struct symbol *sym,
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struct list_head *head, int evidx)
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{
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struct annotation *notes = symbol__annotation(sym);
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struct sym_hist *h = annotation__histogram(notes, evidx);
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struct objdump_line *pos;
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h->sum = 0;
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list_for_each_entry(pos, head, node) {
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if (pos->offset != -1) {
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h->addr[pos->offset] = h->addr[pos->offset] * 7 / 8;
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h->sum += h->addr[pos->offset];
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}
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}
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}
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void objdump_line_list__purge(struct list_head *head)
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{
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struct objdump_line *pos, *n;
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list_for_each_entry_safe(pos, n, head, node) {
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list_del(&pos->node);
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objdump_line__free(pos);
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}
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}
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int symbol__tty_annotate(struct symbol *sym, struct map *map, int evidx,
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bool print_lines, bool full_paths, int min_pcnt,
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int max_lines)
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{
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struct dso *dso = map->dso;
|
|
const char *filename = dso->long_name;
|
|
struct rb_root source_line = RB_ROOT;
|
|
LIST_HEAD(head);
|
|
u64 len;
|
|
|
|
if (symbol__annotate(sym, map, &head, 0) < 0)
|
|
return -1;
|
|
|
|
len = sym->end - sym->start;
|
|
|
|
if (print_lines) {
|
|
symbol__get_source_line(sym, map, evidx, &source_line,
|
|
len, filename);
|
|
print_summary(&source_line, filename);
|
|
}
|
|
|
|
symbol__annotate_printf(sym, map, &head, evidx, full_paths,
|
|
min_pcnt, max_lines);
|
|
if (print_lines)
|
|
symbol__free_source_line(sym, len);
|
|
|
|
objdump_line_list__purge(&head);
|
|
|
|
return 0;
|
|
}
|